MONETARY POLICY SHOCKS AND ISLAMIC
BANKS’ DEPOSITS IN A DUAL BANKING SYSTEM:
A COMPARATIVE ANALYSIS BETWEEN
MALAYSIA
AND BAHRAIN
Rosylin
Mohd Yusof
Associate
Professor
Kulliyyah
of Economics and Management Sciences
International
Islamic University Malaysia
53100
Gombak, Kuala Lumpur
Mohammed
Al Wosabi
Assistant
Professor
College
of Business and Administration, University
of Bahrain
M.
Shabri Abdul Majid
Assistant
Professor
Kulliyyah
of Economics and Management Sciences
International
Islamic University Malaysia
53100
Gombak, Kuala Lumpur
ABSTRACT
The objective of the paper is to empirically explore
the dynamic inter-relationships between deposits of Islamic banks with monetary
policy variables in Bahrain
and in Malaysia .
Both these countries are being dubbed as the worlds' largest International Islamic
Financial Hubs. In terms of market share, as at 2006, the Islamic banking
assets in Malaysia and Bahrain amount to about 13 percent and 6.2 percent
respectively (CBB, BNM; 2007). A comparative analysis between these two
countries highlights the differences and similarities of the impact of monetary
policy shocks on the Islamic banks' deposits. The analysis comprises of two
major testing approaches. First, the auto-regressive
distributed lag (ARDL) model is used to examine the long-run relationship among
the variables. Second, the vector
error-correction model (VECM) is adopted to explore the short- and long-run
dynamics between the variables. The
study focuses on the Malaysia
and Bahrain
data covering the period from January 2001 to June 2006. The results from these tests would determine
if the deposits play s significant role in transmitting monetary policy effects
to the economy. Compared
to the Malaysia Islamic banks' deposits, the study finds that the Islamic
banks’ deposits in Bahrain are sensitive to monetary policy changes, This
implies that the Bahrain Islamic banks are less capable to offset the
de-stabilizing impact of monetary policy as compared to its Malaysian counterpart.
Keywords:
monetary policy; Islamic and conventional banks; auto-regressive distributed
lag (ARDL) model; vector error-correction model (VECM); multi-variate causality
1.
INTRODUCTION
Studies supporting the merits of an interest-free monetary and banking
system have been extensive. In general,
these studies propose that the relative monetary stability accorded by an
interest-free monetary system is due to its asset-linked nature as compared to
the interest-based system which is subjected to the fluctuations in the
interest rate levels. A monetary system
which is relying on interest-free assets eliminates the element of
speculation. Due to this, it is proposed
to be more predictable and has reliable link to the policy objectives, thus can
be effectively controlled by the monetary authority. Consequently, there is a general
belief that the Islamic banking system is somewhat shielded from the risks
associated with interest rate fluctuations and is more stable compared to the
conventional banking system. Khan (1985)
further suggests that the Islamic financial market is able to weather economic
and financial crisis better. In line with this, current research efforts in
this area are mainly focused towards developing and evaluating the demand for
Islamic monetary instruments and demonstrating the validity and effectiveness
of these instruments for monetary policy purposes.
In the last
decade, the empirical literature in the area of Islamic banking has been
focused on product and development as well as the viability of Islamic banking
in the current financial intermediation process. We find that there is a lack of research
interest in the area of monetary policy from the Islamic perspective in
general, and monetary transmission mechanism, in particular. With the increasing role that the Islamic
banks are playing in both Malaysian and Bahrain economies, it is therefore
timely to assess the transmission of monetary policy through Islamic banks’
deposits. Currently, both Malaysia and Bahrain are
being dubbed as the two biggest International Islamic Financial Hubs of the
world (Qorchi, 2005). Given that both these countries have conventional and
Islamic banking working in parallel; this study hopes to cast some light on the
similarities and differences of effects of the monetary policy shocks on the
Islamic banks deposits in these two countries. This study also hopes to
contribute towards enriching the empirical studies on the validity and
viability of Islamic monetary instruments for monetary policy implementation purposes (see, for example, Kaleem, 2000;
Samad and Hassan, 2000; Samad, 1999). Another
aspect of novelty of this paper is in terms of its methodology. This study adopts the auto-regressive
distributed lag (ARDL) model and the vector error-correction model (VECM),
which has never been adopted in this area.
In the finance literature, interest
rate risk can be broadly defined as the impact of interest rate changes on a
bank's profitability, cash flows as well as net worth (Batcha, 2007). Financial
intermediaries such as commercial banks (both Islamic and conventional) are inherently
exposed to interest rate risk particularly due to the fact that they have
little control over the deposit structure of the banks. An increase in interest
rate signals a higher cost of funds and banks may have to pay higher interest
rates to attract new deposits. This may be made worse if the bank is an Islamic
bank because there is always possibility of depositors (both non muslims and
perhaps Muslims) switching accounts or withdrawing funds.
The role of a financial intermediaries such
as banks emanates from the balance sheet items; both assets and liabilities.
Money channel highlights the importance of banks in generating liabilities such
as deposits. Banks create money through the deposits and other placement
earnings from customers, banks and other financial institutions. For instance,
a contraction in money supply, reduces the banks' reserves due to reserve
requirements. This in turn, reduces the banks' ability to increase deposits. As
a result, fewer deposits are placed by the banks customers (Ford et. al, 2003).
Ramlogan (2004) asserts that in the money channel there are two classes of
assets; money and all other assets. A reduction in the level of reserves
prompts a fall in the in the level of deposits. Therefore if money demand is
related to interest, an open market interest rates need to rise to restore
equilibrium.
Although theoretically, Islamic banks and
conventional banks in a dual banking system are governed by different
philosophical foundations, it is inevitable that these two systems may interact
given that they operate in a common macroeconomic environment. For instance,
although the Islamic banks operate within the interest-free framework, the
macroeconomic environment in a dual banking system exposes them to problem
associated with interest rate risks faced by conventional banks. This paper
therefore seeks to investigate the proposition that Islamic banks are not
susceptible to interest rate changes given that its asset-linked nature as
compared to their conventional counterparts.
The rest of this paper is
organized as follows: the next section provides some theoretical underpinnings
and literature review. Section 3 highlights an overview of the banking systems
both in Malaysia
and. in Bahrain .
Section 4 discusses the data and empirical framework. Section four presents the empirical findings
and analysis of the results. Lastly,
section five concludes.
III. LITERATURE REVIEW
Empirical assessment on the merits of
the interest-free banking system has been initiated by Darrat (1988) who showed
that the banking system in Tunisia
becomes more stable without interest-bearing assets than if these assets were
to exist. More recent studies such as
Darrat (2000) and Kia (2001) provide
further empirical evidences on the advantages of the interest-free monetary and
banking system by focusing on the case of Iran which has a long history in
implementing a full-fledged interest-free monetary and banking system since 1984. These studies find that both short and
long-run interest-free money demand functions are stable and their coefficients
are invariant with respect to policy and other exogeneous shocks. Kia and Darrat (2003) compare the demand
equations for money and profit-sharing deposits and find that the demand for
profit-sharing deposits possesses the most stable and policy invariant
function, suggesting that profit-sharing banking scheme insulates the monetary
system from interest rate fluctuations and minimizes the possibility of
financial instability. Consequently, it
is further suggested that the profit-sharing deposits could represent a
credible instrument for monetary policy-making in Iran .
Kaleem (2000),
Samad and Hassan (2000) and Samad (1999) are among the many studies which
provide empirical supports on the stability of the Islamic monetary instruments
in a dual banking system in Malaysia . For instance, Kaleem (2000) analyzes the
Malaysian data over the period from January 1994 to December 1999 and finds
that Islamic banking is more crises-proof due to its asset-linked in
nature. In view of this, the
interest-free monetary instruments are proposed to be valid and effective
instruments that are useful, if not, better than the interest-based monetary
instruments, for monetary policy implementation purposes.
Despite the
numerous studies supporting the superiority of the interest-free banking system
over the interest-based system, further research on more detailed aspects of
the relationships between the interest-free banking and various aspects of
financial risks reveal some concerns. Baldwin (2002) finds that there is a general lack of
awareness in adopting the best risk management practices in the Islamic
countries due to an erroneous belief that an Islamic bank, by virtue of its
interest-free nature, is not subjected to the interest rate fluctuations. Rosly (1999) finds that Islamic banks in Malaysia are at
disadvantage compared to the conventional banks when there is an increase in
market interest rates. While the
conventional banks could reap higher profit due to the increase in interest
rates, Islamic banks face negative funds gap since interest-free financing is
based on fixed rate, while liabilities (deposits) are benchmarked against the
prevailing interest rates. However,
Kareem and Verhoeven (2005) examine whether interest-free banking institutions
in Malaysia
is subject to the three types of bank risks, namely, credit risk, interest-rate
risk and liquidity risk. The study finds
that while the commercial banks with interest-free financing have significantly
lower credit and liquidity risks, they have significantly higher interest-rate
risk than the banks without Islamic financing. (Bacha, 2005)
An examination of the impacts of the
conventional money market rates on the Islamic financial instruments in Malaysia by
Kaleem and Isa (2006) reveal another weakness of the interest-free monetary
system particularly in a dual banking system such as that in Malaysia . The study finds that the current financial
market setup is not in favour of the interest-free banking system because it
enables the conventional banks to take advantage of the arbitrage opportunities
provided by the dual banking system. The
conventional banks have the flexibility of investing in both the interest-free
and the interest-based financial markets, thus making profit from the interest
rate differencials between the two markets.
On the other hand, the Islamic banks are only limited to raise financing
in the Islamic money market.
III. ISLAMIC
BANKING SYSTEM IN MALAYSIA
AND BAHRAIN :
AN OVERVIEW
ISLAMIC
BANKING IN MALAYSIA
Islamic banking
industry in Malaysia
has undergone remarkable growth in the last two decades due largely to the
supportive policy environment provided by the government through the central
bank – Bank Negara Malaysia . Since the establishment of the first
full-fledged Islamic bank in 1983 and the introduction of the Islamic banking
window scheme by the conventional banks in 1993, the Islamic banking industry
continued to stage an impressive performance.
In the period from 1993 to 2006, the total assets of the Islamic banks
surged to RM73.8 billion in 2006 from RM2.4 billion in 1993, registering an
impressive compounded annual growth rate of 30.2 percent per year over the
thirteen-year period. In the same
period, total Islamic deposits mobilised by the banking system increased to
RM50.5 billion at end-2006 from a mere RM2.2 billion in 1993. Meanwhile, the growth of total financing was
also impressive at RM78.5 billion at end-2006 compared to RM1.1 billion in
1993. The encouraging performance of the
Islamic banking in Malaysia
can be attributed to the wide office network that enabled easy access by
customers throughout the country. By
end-2006, there were 10 full-fledged Islamic banks (another Islamic bank
commenced operation in early 2007), having a branch network of 1,167 comprising
of Islamic banking branches and counters made available by the full-fledge
Islamic banks and the conventional banks which offered the Islamic banking
windows scheme.
Despite the impressive growth, the share
of Islamic banking of the total financing extended by the banking system is
still small. Of the total deposits
mobilised by the banking system in 2006, Islamic banks contributed about 12.4
percent, a small improvement from 5 percent recorded in 2000. Likewise, Islamic banks contribute only 13.3
percent of total financing extended by the banking system.
The Islamic banking industry continues
to grow supported by the conducive environment provided by the BNM. To accelerate development of the industry and
create positive competitive pressure to take advantage of positive spill-over
effects, BNM grants banking licence to full-fledge domestic and foreign Islamic
banks, particularly from the middle-east to operate in the country. By the end of 2006 and early 2007, several
full-fledged Islamic banks commence operations resulting in eleven full-fledge Islamic banks in Malaysia . These are Asian Financial Bank (M) Berhad,
Bank Islam Malaysia Berhad, Bank Muamalat Malaysia Berhad, Hong Leong Islamic
Banking Berhad, CIMB Islamic Bank Berhad, RHB Islamic Bank Berhad, AmIslamic
Bank Berhad, Affin Islamic Bank Berhad, Al-Rajhi Banking and Investment
Corporation (Malaysia) Berhad, EONCAP Islamic Bank Berhad, and Kuwait Finance
House (Malaysia) Berhad. With the
continuous supportive banking policy provided by the BNM, Islamic banking
industry has a bright prospect for growth in the country.
The encouraging growth of the Islamic
banking industry in Malaysia ’s
financial landscape, in part, reflects the country’s strong commitment to
develop a comprehensive Islamic financial system. In working towards this objective, BNM is
carefully taking steps to strengthen the foundation and put in place the
pre-requisites of the system. In August
2006, BNM launched the Malaysia International Islamic Financial Center
initiative to undertake Malaysia ’s
liberalization strategies to a new level with the aim of positioning the
country strategically in the area of Islamic Finance. Under this initiative, “…Islamic banking
institutions are allowed to undertake a broader array of Islamic financial
activities that include commercial banking, consumer banking, investment
banking and international currency business” (Bank Negara Malaysia ,
2007). In other words, financial
institutions in Malaysia
are allowed to strategically positioning themselves in order to take advantage
of the encouraging growth of the Islamic banking and finance industry.
ISLAMIC
BANKING IN BAHRAIN
The Bahraini Islamic banking system is
enjoying a robust and dynamic growth in a favourable financial environment in
the last few years. Bahrain
continues to be an attractive centre for financial institutions with the
banking sector having the largest component of the financial system accounting
for more than 85 percent of the total financial assets. Among the reasons for
this significant momentum are its geographical location, a well regulated
supervision of its monetary authority, serious efforts undertaken in promoting
and enhancing Islamic banking industry together with well –qualified work force
nationals and expatriates and reasonable operating costs (IMF, 2006)
Currently, the conventional banking system
comprises of 19 retail banks, 69 wholesale banks, 2 specialised banks and 36
representative offices of overseas bank. The Islamic banking system on the
other hand, comprises of 6 retail banks and 18 wholesale banks offering a
diversified shariah- compliant products and services. The banking system in Bahrain is also
gaining significant role in the emergence of Bahrain as a leading International
Islamic Financial hub. As at December 2006, the banking sector assets amount to
over USD 180 billion, which is more than twelve times of the annual GDP (CBB,
2007).
The significant role of the banking
industry in the emergence of Bahrain
as a leading International Islamic Financial hub is further evidenced by the
growth of its total assets. As at December 2006, the banking sector assets
amount to over USD 180 billion, which is more than twelve times of the annual
GDP. The Islamic banking industry in particular witnessed phenomenal growth with
its total assets jumping from US$1.9 billion in 2000 to US$ 10.3 billion by
July 2006, an increase of over 400%. Correspondingly, the market share of
Islamic banks is observed to increase from 1.8% of total banking assets in 2000
to 6.2% in 2006 (CBB, 2007).
Backed by the escalating fuel prices and a
corresponding increase in liquidity within the GCC region, the Islamic banking
and finance industry in Bahrain
is expected to continue gaining a spectacular momentum and a remarkable
progress to further enhance its position as global leader in Islamic banking
and finance.
Against the backdrop of this
burgeoning growth of the two global leaders in Islamic banking and finance
industry, Malaysia
and Bahrain ,
it is imperative that we also assess the effects monetary policy transmission
mechanism on the deposits in these two systems. In view of the increasing role
played by Islamic banking in the intermediation process in both countries, it
is therefore important to conduct a deeper analysis on the role of Islamic bank
deposits in the transmission process of monetary policy. The findings from this study would help to
determine the relevance of Islamic banking industry in the countries' monetary
policy implementation and the viability of developing a comprehensive Islamic
financial system. At the same time, the similarities and differences of these
two systems would help both countries to design relevant monetary policies to
further strengthen their positions as two largest international hubs in Islamic
banking and finance.
3. DATA AND EMPIRICAL
FRAMEWORK
3.1 The Model
Ramlogan (2004) asserts that in the money channel
there are two classes of assets; money and all other assets. A reduction in the
level of reserves prompts a fall in the in the level of deposits. Therefore if
money demand is related to interest, an open market interest rates need to rise
to restore equilibrium. Consistent with the money channel theory as proposed by
Keynes(1936), empirical model can therefore be represented as follows:
IB Depositst = δ0 + f1ONRt + j2GDPt + g3REERt + μ4M2t + €t
(1.0)
The overnight rate (henceforth denoted as ONR) is used
as the monetary policy indicator for Malaysia , and for Bahrain , the
Interbank rate is used as the monetary policy indicator. The objective variables comprised of the Islamic
Banks' deposits for both Bahrain
and Malaysia .
The other objective variables employed in this study are money supply M2 and
GDP. Given that Malaysia
and Bahrain
are highly open economies, the conduct of monetary policy may be influenced by
foreign shocks, thus we also included real effective exchange rate as a control
variable.
The GDP represent the growth
of an economy and therefore may be regarded as determinant of deposits in the
banking system. An increase in GDP is expected to have a positive effect on the
Islamic banking deposits. For Malaysia ,
the GDP is proxied by IPI and for Bahrain , it is proxied by Refined
by Petroleum Production. The money supply as measured by M2, on the other hand,
can be regarded as primary indicator of future growth potential (Said and
Ismail, 2005). Excessive growth in money supply signals a rising inflation and
therefore is anticipated to have a negative impact on deposits. All series are
adjusted with 2000 base year and except for ONR, are expressed in natural
logarithms.
A higher exchange
rate on the other hand results in higher imports prices and inturn, increases domestic prices.
Accordingly, a higher exchange rate reduces exports prices and thus leading to
a higher demand for exports. (Kia and Darrat, 2007). As a result, the higher
demand for resources creates a pressure on domestic prices and hence reduces
deposits in Islamic banks.
3.1. Data
Due to unavailability of data for comparative
analysis, we employ data that are most appropriate to represent each objective
and macroeconomic variable. The data description is summarised in the table
below
Table
1: Data Description and Sources
Variable
|
Description
|
Measurement
|
Source
|
ID (
|
Islamic banks'
Deposits in
|
Total deposits
in the Islamic banking system.
|
BNM
|
ID (
|
Islamic
Deposits in
|
Domestic
Liabilities of Islamic banks to private non-banks
|
CCB
|
M2
|
Real
broad-Money Supply
|
Money Supply M2
(
Money + Quasi
money (
|
IFS
|
ONR
|
Interest Rate
|
Overnight
policy Rate (
Money market
interbank rate (
|
IFS
|
IPI
|
GDP
|
Industrial
Production Index (
Refined
Petroleum production (
|
IFS
|
REER
|
Real Effective
Exchange Rate
|
The weighted
average of the Malaysian /
|
IFS
|
3.2. Empirical Framework
A battery of time series techniques are used to
empirically explore the dynamic interrelationships between the Islamic banks' deposits
in Bahrain
and Malaysia
and the monetary policy variables. Autoregressive
distributed lag (ARDL) model is employed to empirically examine the long-run
relationship among the variables, while the vector error correction model
(VECM) is used to explore the short- and long-run dynamics among the variables.
3.2.1. ARDL Bound Testing
Approach
To examine the relationship between
deposits of the Islamic banking system and the monetary policy variables, this
study employs the newly proposed ARDL bound testing approach to cointegration
(see Pesaran et al., 2001). It
involves estimating the conditional error correction version of the ARDL model.
The choice of ARDL approach in this study is based on consideration of
cointegration analysis are unbiased and efficient given the fact that, firstly,
it can be applied to a small sample size study (Pesaran et al., 2001) and therefore conducting bounds testing will be
appropriate for the present study. Secondly, it estimates the short- and
long-run components of the model simultaneously, removing problems associated
with omitted variables and autocorrelation and, thirdly, the ARDL method can
distinguish between dependent and independent variables (Narayan, 2004).
Ideally, for the purpose of this study, we
need to incorporate all the variables in the modelling, but a VAR model can be
poorly estimated in a finite sample, as the addition of a variable will quickly
exhaust the degree of freedom. Following Gertler and Gilchrist (1993, 1994), we
estimated a series of separate VAR models including M2, IPI, and REER, policy
variable (ONR), and the Islamic banks' deposits. Thus, our models contain only
five variables.
The ARDL models for the conventional and
Islamic bank balance sheet items used in this study can be written as follow:
Islamic
Deposits: Bahrain :
BIDt
= δ0 + f1ONRt + j2IPIt + g3REERt + μ4M2t + €t (1.1)
Islamic
Deposits: Malaysia
MIDt = δ0 + f1ONRt + j2IPIt + g3REERt + μ4M2t + υt (1.2)
The error correction version of ARDL framework
pertaining to the variables in the Equations (1.1) through (1.4) can be
reproduced as follows:
For Islamic
Deposits: Bahrain :
(2.1)
For Islamic
Deposits: Malaysia
(2.2)
In the above equation, the terms with the
summation signs represent the error correction dynamic, while the second part
(term with λs) correspond to
the long-run relationship. The null of no cointegration in the long-run
relationship is defined by H0:
λ1 ≠ λ2 ≠ λ3
≠ λ4 ≠ λ5 = 0 is tested against the alternative of H0: λ1 ≠
λ2 ≠ λ3 ≠ λ4 ≠ λ5 ≠ 0, by the means of familiar F-test. However,
the asymptotic distribution of this F-statistic is non-standard irrespective of
whether the variables are I(0) or I(1). Pesaran et al. (1996) have tabulated
two sets of appropriate critical values. One set assumes all variables are I(1)
and another assumes that they are all I(0). This provides a bound covering all possible
classifications of the variables into I(1) and I(0) or even
fractionally integrated. If the
F-statistic lies above the upper bound level, the null hypothesis is rejected,
which indicates the existence of cointegration. However, if the F-statistic falls below the
bound level, the null cannot be rejected, showing that no cointegration exist. If, however, it falls within the band, the
result is inconclusive. Finally, in order to determine the optimal lag-length
incorporated into the model and select the ARDL model to be estimated, the
study employs the Akaike Information Criteria (AIC).
3.2.2. VECM Framework
To examine the short- and long-run dynamic relationships
among the variables, the study employs the vector error correction model (VECM)
framework. The VECM regresses the changes in the both dependent and independent
variables on lagged deviations. The
multivariate causality test based on VECM can therefore be formulated as
follows:
Zt
= d + iZt-1 +
…….+ kZt-k
+ PZt-k
+ εt (3)
where Zt is an
n x 1 vector of variables and d is an n x 1 vector of constant,
respectively. In our case, Zt
= (CD/CL/ID/IL, ONR, IPI, RER, INF). G is an n
x n matrix (coefficients of the short run dynamics), P = ab′ where a is an n x 1 column vector (the matrix of
loadings) represents the speed of short run adjustment to disequilibrium and b′ is an 1 x n cointegrating row vector (the
matrix of cointegrating vectors) indicates the matrix of long run coefficients
such that Zt converge in their long run equilibrium. Finally,
εt
is an n x 1 vector of white noise
error term and k is the order of
autoregression.
A test statistic is calculated by taking
the sum of the squared F-statistics of G and
t-statistics of P. The multivariate causality test is
implemented by calculating the F-statistics (Wald-test) based on the
null-hypothesis that the set of coefficients (G) on the lagged values of independent variables are not
statically different from zero. If the null-hypothesis is not rejected, then it
can be concluded that the independent variables do not cause the dependent
variable. On the other hand, if P is significant (that is different from zero) based on
the t-statistics, then both the independent and dependent variables have a
stable relationship in the long-run.
Finally, from the Equation (3), two
channels of causation may be observed. The first channel is the standard
Granger tests, examining the joint significance of the coefficients of the
lagged independent variables. Whereas, the second channel of causation is the
adjustment of the dependent variable to the lagged deviations from the long run
equilibrium path, represented by the error correction term (ECT). If the ECT is
found to be significant, it substantiates the presence of cointegration as
established in the system earlier and at the same time, it tells us that the
dependent variable adjusts towards its long run level. From these tests, we can
reveal four patterns of causal interactions among pairs of the variables, i.e.,
(i) a unidirectional causality from a variable, say x, to another variable, say
y; (ii) a unidirectional causality from y to x; (iii) bidirectional causality;
and (iv) independent causality between x and y.
4.
EMPIRICAL RESULTS AND ANALYSIS
In estimating the short- and long-run relationships
between the monetary policy variable and the objective variables consisting of
the deposits of Islamic banks in both countries Bahrain and Malaysia and
the selected macroeconomic variables, we need to determine the lag-length of
the first-differenced variables. Bahmani-Oskooee and Bohl (2000) have shown
that the results of this first step are usually sensitive to the lag-length. To
verify this, in line with Bahmani-Oskoee and Wing Ng (2002), we impose the optimal
lag length of 6 on the first difference of each variable to compute the
F-statistics for the joint significance of lagged levels of variables for both
Equations (1.1) to (1.4).
Table 1: F-statistics for
Testing the Existence of a Long-run Equation
Lag-Length
|
|
|
||||
|
Deposits
|
Deposits
|
||||
1
|
3.0679**
|
5.131***
|
||||
2
|
3.2231**
|
2.6054**
|
||||
3
|
3.2643**
|
2.8189**
|
||||
4
|
3.2695**
|
3.1405**
|
||||
5
|
3.1723**
|
4.0748**
|
||||
6
|
3.4642***
|
2.7035**
|
||||
Note: *, **, and *** denotes that F-Statistics falls above the 90%, 95%
and 99% upper bound, respectively.
The computed F-statistics for each
lag-length for all the models are reported in Table 1. As reported, the test
outcome of the significance levels for the ARDL models varies with the choice
of lag-length. The computed F-statistics are significant at least at 90% level
when the order of lags ranges from 1 to 6 for the Islamic banks' deposits for
both Bahrain
and Malaysia .
However, the computed F-statistics for Bahrain Islamic banks' deposits is
only significant at 99% level when the lag-length = 6 is used. Similarly, the
computed F-statistics are found to be
significant at least at 99% level for the Malaysian Islamic bank deposits even when
lag =1 is used. This suggests that there seems to be a cointegration among the
selected variables in both Bahrain
and Malaysian Islamic banks' deposits models. These
results are considered as preliminary, thus enable us to retain the lagged
level of variables.
Table 2: The Long-run ARDL Model Estimates
|
|
|
|
Deposits
[1,0,4,0,2]
|
Deposits
[1,0,0,0,0]
|
C
|
-41,9680***
(-7.59701)
|
.83542 (1.1044)
|
ONR
|
-0.23013***
(-8.4456)
|
.0080720 (.39818)
|
IPI
|
-2.959
(-1.7176)
|
-.037193 (-.55697)
|
M2
|
4.9283***
(12.6564)
|
.74028***
(6.3055)
|
REER
|
2.3562***
(4.1494)
|
-.065221 (-.56918)
|
|
Adj-R2 = .97406
D-W= 1.6822
|
Adj-R2 = .98342
D-W = 2.2625
|
Notes: *, ** and *** denotes significantly at 10%, 5% and 1% level of
significance, respectively. Figures in
the parentheses and squared parentheses are the t-statistics values and
the selected ARDL model. D-W denotes
Durbin-Watson test for autocorrelation.
The next step involves estimating Equations
(1.1) to (1.4) using the appropriate lag-length selection criterion based on
the Akaike Information Criterion (AIC). Based on Table 2, the results provide
evidence that the Bahrain
Islamic banks' deposits seem to be significantly affected by ONR, M2 and REER
during the period of analysis. However,
except for money supply M2, monetary policy variable is not significant in
affecting the Malaysian Islamic banks' deposits, In the context of monetary
transmission mechanism, this result implies that monetary policy shock(via ONR)
is transmitted through bank deposits (the money view) in Bahrain and to a certain
extent via money supply M2 for Malaysia.
In the case of Bahrain , the results suggest that
that monetary policy variable have significant negative effects on the Islamic
banks' deposits. In other words, an
increase in interest rate results in a decline in Islamic deposits in Bahrain . Increase in the policy rate results in
decline in liquidity of the Islamic banks, which curtail the ability of Islamic
banks to supply new loans. This result
is supportive of both the money view of monetary policy transmission. Islamic banks deposits in Bahrain are
shown to be sensitive to interest rate changes, which is supportive of our
earlier study (Kassim et al., 2007).
For Malaysia
on the other hand, the results indicate that the Islamic banks' deposits are
not susceptible to interest rate changes. This may infer that interest rate changes
do not significantly affect deposits and that perhaps other factors like
Islamic awareness rather that profit driven attract depositors to deposit more
funds in the Islamic banks.
In comparing the responses of the channels
of monetary policies in both Bahrain
and Malaysia ,
it is interesting to note that, Islamic banks deposits in Bahrain are
more sensitive to interest rate and other macroeconomic variables shocks. This finding has significant monetary policy
implications. Not only that it implies
that the Islamic banks' deposits are better transmitter for monetary policy
effects, it also reflect the vulnerability of the Islamic banks to monetary
policy changes.
Next, we move on to the multivariate
causality analysis which helps us to explore the short- and long-run dynamics
of the variables in the system. Based on
the VECM framework, we estimate the changes in both dependent and independent
variables on lagged deviations. The estimates of the error correction
representations selected by the AIC are presented in Tables 3 and 4. The long
run coefficients reported for both models involving Islamic banking deposits
for Bahrain
and Malaysia
in Table 2 are employed to generate the error correction terms. The adjusted-R2
values of more than 0.9 for all the models suggest that such error correction
models fit the data reasonably well. In addition, the computed F-statistics
clearly reject the null hypothesis that all regressors have zero coefficients
for both cases. More importantly, the error correction terms (ECTs) carry the
correct negative signs and are significant. This therefore, substantiates our
earlier findings of the existence of cointegration between the Malaysian
banking system and monetary policy variable (ONR). Furthermore, the speeds of
adjustment for all the models are about 15-19 percent. This indicates that last
period disequilibrium is, on the average, corrected by about 15-19 percent in
the following month.
Table 3: Multivariate 'VECM' Causality for the Islamic
Bank (Malaysia )
Dependent Variables
|
Independent Variables
|
|||||||||||||||
ΔID
|
ΔONR
|
ΔIPI
|
ΔM2
|
ΔREER
|
ECTt-1
|
|||||||||||
ΔID
|
|
|
|
|
|
|
||||||||||
ΔONR
|
|
-
|
|
|
|
|
||||||||||
ΔIPI
|
|
|
-
|
|
|
|
||||||||||
ΔM2
|
|
|
|
|
|
|
||||||||||
ΔREER
|
|
|
|
|
-
|
|
Note: ***, ** and *
represent significance at the 1%, 5% and 10% levels, respectively. ECTt-1
is derived by normalizing the cointegrating vectors on the dependent variables
(i.e., BID and MID), producing residual r. By imposing restriction on
the coefficients of each variable and conducting Wald test, we obtain F-statistics
for each coefficient in all equations. Figures in the parentheses and squared
parentheses represent F-statistics
and probabilities for t-statistics,
respectively.
Analyzing the short-run
causalities based on the VECM framework, we find further support to our earlier
findings. Focusing on the direction of
causalities between the monetary policy variable and the bank balance sheet
items, we find that there is a significant causality running from ONR to IPI. However, the monetary policy variable is not
significant in causing Islamic banks' deposits for both Bahrain and Malaysia .. The
results also show that for Malaysia , there
is a significant channel for monetary transmission mechanism through the
following nexus: ONR-IPI and REER-ID. As
being shown by the results based on the ARDL framework, Islamic Deposits in Malaysia is not
a significant channel for monetary policy transmission for the period under
review.
Table
4: Multivariate 'VECM' Causality for
the Islamic Bank (Bahrain )
Dependent Variables
|
Independent Variables
|
|||||||||||||||
ΔIDB
|
ΔONR
|
ΔIPI
|
ΔM2
|
ΔREER
|
ECTt-1
|
|||||||||||
ΔIDB
|
--
|
|
|
|
|
|
||||||||||
ΔONR
|
0.304118
(0.7578)
|
-
|
|
|
|
|
||||||||||
ΔIPI
|
|
|
|
|
|
|
||||||||||
ΔM2
|
|
|
|
|
|
|
||||||||||
ΔREER
|
|
|
|
|
-
|
|
Note: ***, ** and *
represent significance at the 1%, 5% and 10% levels, respectively. ECTt-1
is derived by normalizing the cointegrating vectors on the dependent variables
(i.e., BID and MID), producing residual r. By imposing restriction on
the coefficients of each variable and conducting Wald test, we obtain F-statistics
for each coefficient in all equations. Figures in the parentheses and squared
parentheses represent F-statistics
and probabilities for t-statistics,
respectively.
Shifting to the short-run causality of
monetary policy variable and Islamic banks’ deposits for Bahrain , we
find that there is no short-run causality running from monetary policy variable
to Islamic deposit. In the short run, Islamic
deposits in Bahrain
is also not a significant nexus of monetary policy for the period under
review. This may be due to the fact that
the market share of Islamic banks is only 6.2 percent of the whole banking industry
in Bahrain .
However, based on the ARDL framework, in the long run, we find that the Islamic
banks' deposits in Bahrain
instruments are more sensitive to interest rate shocks and can be used to
influence to achieve the objective of monetary policy.
We then proceed to examine the stability of
the long run coefficients together with the short-run dynamics. Following
Pesaran and Pesaran (1997), we apply the CUSUM test proposed by Brown et al.
(1975). The tests are employed for both models. As highlighted by
Bahmani-Oskooee and Ng (2002), the CUSUM test employs the cumulative sum of
recursive residuals based on the first set of observations and is updated
recursively and plotted against the break points. If the plot of the CUSUM
statistics is found to be within the critical bounds of 5% level, the null
hypothesis that all coefficients in the error correction models as in Equations
(2) and (3) are stable cannot be rejected. On the other hand, if the lines are
found to be crossed, the null hypothesis of coefficient constancy can therefore
be rejected at 5 percent significance level. Based on the graphical
representations for CUSUM test for all models are reported respectively as in
Figure 1, the results indicate no evidence of any significant structural instability.
Figure 1: CUSUM
and CUSUMSQ Plots
Islamic Deposits: Malaysia
Islamic Deposits: Bahrain
5.
Conclusion
In
conclusion, the study shows that the Islamic banks’ deposits in Bahrain are
relatively more sensitive to monetary policy changes compared to that of Malaysian
Islamic banks in the long run. The Islamic banks' deposits in Bahrain are
therefore more directly impacted by the monetary policy shocks. The Malaysian Islamic banks' deposits on the
other hand, seem to be insensitive to interest rate changes and therefore more
policy invariant suggesting Islamic banks in Malaysia are able to offset the
de-stabilizing impact of monetary policy.
Given, the differences in macroeconomic environments, Islamic banks'
deposits seem to response differently to changes in monetary policy variable.
This brings us to underscore that monetary policy shocks have more
de-stabilizing impact on Bahrain
Islamic banking compared to its Malaysian counterpart.
Due to
vulnerability to interest rate changes, Islamic financial institutions in Bahrain as well
as in Malaysia
to a certain extent, has a long way to go in developing the risk management
standards that could address the above concerns. Iqbal (1999) noted that despite the growing
interest in the Islamic banking and finance, the Islamic financial markets are
still lacking in terms of risk management tools. These are important issues that need to be
considered and resolved in ensuring that Malaysia ’s and Bahrain 's efforts
to promote the interest-free banking and monetary system would become
successful. These results have important implications for both Bahrain and Malaysia in
enhancing further efforts in achieving its objectives to become two largest
International Islamic financial hubs of the world.
As shown in this study, it could also be implied that
the variables that are relevant in the monetary policy transmission would have
to be continuously monitored due to the dynamic nature both economies. As being shown in the study, the importance
of the Islamic bank's deposits in the monetary transmission in Bahrain needs
to be noted in designing monetary policies in both economics. In this aspect, an area for further research extension
would be in providing a mechanism that could continuously take into account the
latest economic and financial data so as to ensure the most relevant policy
targets. This study attempts to provide
an avenue towards this effort.
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