GLOBAL PARTNERSHIP OF ASIAN COLLAGES
Transcript of GLOBAL PARTNERSHIP OF ASIAN COLLAGES
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By Paul, Carina, Jennifer, Wendy, Benson
GLOBAL
PARTNERSHIP
OF
ASIAN
COLLAGES
International Finance
Does Interest rate parity hold?
Paul Lin / Carina Liao / Jennifer Li
Wendy Hsu / Benson Chen
Supervisor: Prof. Hsieh
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Abstract
Many literatures have discussed whether IRP exist empirically, some papers had
the conclusion that IRP was rejected in the reality. In practice, it is often the case that
people had a greater demand in high interest rate currencies and push them to the edge
of appreciation rather than depreciation. Therefore, Burnside et al. (2011) had found
that the carry trade creates a sizable return and a Sharp ratio more than twice of the
U.S. stock market.
In our study, however, we test IRP in a more straight forward method. We use
empirical data and a regression analysis to test the IRP equation directly. And then we
calculate the return from the currencies that highly deviated from the prediction of the
theory.
We test the data of eight major currencies around the world and among
Asian-Pacific area. The result isnβt surprise that IRP does not hold between most of
the countries. Nevertheless, when we calculate the return we do find negative or
economically insignificant returns in some portfolios.
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1. Introduction
Many literatures have discussed whether IRP exist empirically, such as Bilson
(1981) and Fama (1984). Both of them had the conclusion that IRP was rejected in the
reality. In practice, it is often the case that people had a greater demand in high
interest rate currencies and push them to the edge of appreciation rather than
depreciation. Therefore, Burnside et al. (2011) had found that the carry trade creates a
sizable return and a Sharp ratio more than twice of the U.S. stock market. Other
papers researched in the carry trade strategy include, Fama and French (1993),
Brunnermeier et al. (2009), Farhi et al. (2009), Lustig et al. (2011), Mueller et al.
(2012). Most of the work done on interest rate parity tested the theory in a somewhat
indirect way. They first identified that there is an excess return, and then they had the
conclusion that IRP does not hold empirically.
There has long been an argument that whether interest rate parity (IRP) holds in
reality. According to an article Carry on trading published on Economist August 10th
2013, around $5 trillion is traded on the foreign-exchange markets every single day,
and that compares with global trade in goods and services of $18.3 trillion a year, or
about $50 billion a day. Apparently, shifting capital around the world moves
currencies more than trading on goods and service. The article continued to conclude
that the mean factor for investors to prefer one currency over another is the carry trade.
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To us, it implies that the carry trade must be overall profitable, so that investors
around the world keep conducting these kinds of currency arbitrage strategies.
The carry trade is one of the oldest and most popular currencies trading strategy
that involves in borrowing money from a lower interest rate country and investing in a
high interest return market. The return will then be determined by interest rate
differences as well as exchange rate gaps. In other words, the carry trade is profitable
only when the interest rate parity does not hold. If IRP holds, the return we gain form
interest rate differences will then be on average offset by a compensatory depreciation
of the high interest rate currencies, and the expected return from these currency
speculation strategy will then turn out to be zero.
In this paper, however, we test IRP in a more straight forward method. We use
empirical data and a regression analysis to test the IRP equation directly. And then we
calculate the return form the currencies that highly deviated from the prediction of the
theory.
We test the data of eight major currencies around the world and among
Asian-Pacific area. Our study covered the period from 1995 to 2014; all of the data
are monthly average. The result isnβt surprise that IRP does not hold between most of
the countries. Nevertheless, when we calculate the return we do find negative or
economically insignificant returns in some portfolios.
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The paper is organized as follows. In section 2 we describe the methodology we
used in this paper. In section 3 we explain the empirical data, show the result of
regression, and calculate the portfolio returns. In the final section, we conclude our
findings and contributions.
2. Methodology
This section contents of three parts. First, we introduce the IRP theory. Second, we
describe the statistics. Third, we identified the return gain from the carry trade.
2.1 Interest parity theory
Researchers have long been curious about how exchanges are determined, and
had proposed lots of theories and possible explanations. Examples include
International Indebtedness Theory (Goschen 1861), and the Purchasing power parity
(e.g. Cassel 1922). The Interest Rate Parity was formalized and brought to peopleβs
attention by the famous Keynes (1923). For the covered interest rate parity (CIP), the
forward exchange rate of a currency can be expressed as follow:
πΉπ‘ = (1 + π1 + πββ )
π‘ππ‘,
where πΉπ‘ is the forward exchange rate of a certain currency for time t+1 at time t; π
and πβ represent the risk free interest rate at home and in foreign country
respectively; ππ‘ stands for the spot exchange rate at time t.
2.2 Multi-regression analysis
(1)
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In this paper, we used the multiple regression analysis to test if equation (1) holds
empirically. Multiple regression analysis is a widely used statistical technique for
researches of Economics. It can help us speculate the relationship between two or
more variables. For example, to describe the overall pattern of a dependent variable
(Y) to a single independent or explanatory variable (X), the general multiple
regression equation can be stated as:
y = a + b1X1 +b2X2 + . . . + bkXk
Where a is the intercept, the value of Y when all the Xβs are zero and bj is the amount
by which Y changes when that particular Xj increases by one unit, with the values of
all the other independent variables held constant. Following the general multiple
regression equation are the basic assumptions for regression analysis: 1. Given each
value of X, there is a group of Ys, and y is the estimation of the mean of those Ys. 2.
The probability distribution of Ysβ values follows the normal distribution. 3. The
means of these normal distributions (y) is a linear function of X. 4. The standard
deviations of these normal distributions are all the same. 5. The observations (X1,
Y1), β¦ ,(Xn, Yn) are statistically independent.
3. Empirical results
In this section, we will first show the data we selected. And then we will reveal our
empirical finding.
(2)
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3.1 Data and descriptive statistics
Spot exchange rates and one-year forward exchange rates as well as risk-free
interest rates in eight selected countries are all taken from Datastream provided by
Thomson Financial. The eight selected currencies are New Taiwanese Dollar, Korean
Won, Japanese Yen, Australian Dollar, United Kingdom Pound, Euro, Chines Yuan
and the U.S dollar. We used three month LIBORs as risk-free interest rate for most of
the countries, and for those who donβt have LIBORs we used average three month
certificate deposit rate. The data are all in monthly average terms. There are 230
observations during the sample period January 1995 to March 2014. Figure 1 shows
the trends of spot and forward exchange rate of each currency as well as the risk-free
interest rate in each country.
Exchange rate Interest rate
Taiwan
Australia
0
10
20
30
40
1995 1998 2002 2006 2010
NT $ TO US $
0
2
4
6
8
10
1995 1998 2002 2006 2010
MONEY MARKET 90 DAYS RATE
0
0.25
0.5
0.75
1
1.25
1995 1998 2002 2006 2010
US $ TO AUSTRALIAN $
0
2
4
6
8
10
1995 1998 2002 2006 2010
INTERBANK RATE - 3 MONTH
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Japan
Korea.
U.K.
Euro
China
Figure1. Exchange rates and interest rates of the seven countries
00.25
0.50.75
11.25
1.5
1995 1998 2002 2006 2010
US $ TO 100 JAPANESE YEN
0
0.5
1
1.5
2
2.5
1995 1998 2002 2006 2010
INTERBANK RATE-3 MONTH
0
500
1000
1500
2000
1995 1998 2002 2006 2010
KO KOREAN WON TO US $
0
10
20
30
1995 1998 2002 2006 2010
NCD 91 DAYS MIDDLE RATE
0
0.5
1
1.5
2
2.5
1995 1998 2002 2006 2010
US $ TO UK POUND
0
2
4
6
8
10
1995 1998 2002 2006 2010
INTERBANK RATE-3 MONTH
0
0.5
1
1.5
2
1995 1998 2002 2006 2010
U.S. $ TO EURO
0
2
4
6
8
1995 1998 2001 2004 2008 2011
INTERBANK RATE-3 MONTH
0
2
4
6
8
10
1995 1998 2002 2006 2010
CHINESE YUAN TO US $
02468
1012
1995 1998 2002 2006 2010
3M DEPOSIT - MIDDLE RATE
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We easily analyze the figures above. As you can see, Taiwan had a significant drop
during 2000~2002 when Taiwan were going through the Dot-com bubble. Korea and
China had a big interest rate drop in 1997 when the huge financial crisis, Asian
Financial Crisis exploded. This crisis started in Thailand, raised fears of a worldwide
economic meltdown. After that, there is no obvious interest rate fluctuation in Korea.
As for china, due to government controls the interest rates after 1997 were almost the
same. The curve is very flat. Australia and U.K. both had a bigger interest rate
fluctuation during 2008~2009 because of the Global financial crisis. Euro is
constantly fluctuating, and the most obvious drop was also in 2008.The crisis resulted
in the threat of total collapse of large financial institutions, downturns in stock
markets worldwide, and changed the global financial environment a lot. Last, the
interest rate fluctuation in Japan. There is a drop around the year of 1996. Since 1990s,
Japan went into a recession often referred as The Lost Tow decade. Therefore the
government drew down interest rate to stimulate consumption in 1996. Japan had zero
interest rate during 2001~2006, it was a policy carried out by the Japan government,
which wanted to eliminate the serious deflation problems at that times. Because of the
Japan zero interest rate, many people borrowed Japan yen to gain profit from carry
trade.
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3.2 Results from regression analysis
From (1) we can take the nature log on the both side, and rewrite it into:
πππΉπ‘ = ππππ‘ + π‘ππ(1 + π) β π‘ππ(1 + πβ),
The reason why we take the nature log is just for simplicity. In this study, we do
not deal with the dynamic problems, so t can be ignore for the time being. To further
analyze the empirical data we use a multi-regression analysis. Consider the
regressions of πππΉπ‘ on ππππ‘, ππ(1 + π) and ππ(1 + πβ),
πππΉ = πΌπ + π½π1πππ + π½π2ππ(1 + π) + π½π3ππ(1 + πβ),
Estimates from (4) tell us whether spot exchange rate (S), interest rate at home
(1+r) and interest rate in foreign country (1+r*) together have the power to predict
forward exchange rate of time t+1 (observed at time t). Evidences suggest that π½π1 is
significantly non-zero means that spot exchange has an influence on forward
exchange rate. Likewise, evidences suggest that π½π2 and π½π3 are reliably away from
zero tell us that interest rate at home and abroad have the power to predict F.
Given a rational or efficient exchange market, and the assumption that IRP holds
between the observed two countries, the regression coefficients in (4) should be:
πΌπ = 0 π½π1 = 1 π½π2 = 1 π½π3 = β1,
To test the estimated coefficients, we will then use a one-Sample T Test to see
whether the empirical result is reliably different from the prediction of the Interest
(5)
(4)
(3)
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Parity Theory. The T statistic from (4) and (5) will then be,
ππΌπ=
πΌπβ0
ππΈπΌπ
,
ππ½π1=
π½π1β1
ππΈπ½π1
,
ππ½π2=
π½π2β1
ππΈπ½π2
,
ππ½π3=
π½π3β(β1)
ππΈπ½π3
,
where the null hypothesis is that πΌπ = 0, π½π1 = 1, π½π2 = 1, π½π3 = (β1), while the
alternative hypothesis is πΌπ β 0, π½π1 β 1, π½π2 β 1, π½π3 β (β1). T and SE are the t
statistic and the standard error of estimate for the four coefficients respectively.
By (4) to (9), we can test the empirical data to see whether the reality is really
deviated from the prediction of the IRP Theory. In this way we are different from
most of the studies regarding this topic in which we test the IRP directly. If the
coefficients of the regressions really deviate from the predicted value, we can come to
the direct conclusion that the Interest Rate Parity is rejected empirically.
Table 1 summarized the results for the regression of πππΉπ‘ on ππππ‘, ππ(1 + π)
and ππ(1 + πβ). The anomalous numbers in the table are the estimated coefficients.
And the numbers in ( ) are the p value of the coefficients, which test the hypothesis of
π»0: πΌπ = 0, π½π1 = 1, π½π2 = 1, π½π3 = (β1) ,and π»1: πΌπ β 0, π½π1 β 1, π½π2 β 1,
π½π3 β (β1)
We test the IRP between seven countries and the U.S. These currencies are
(6)
(7)
(8)
(9)
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selected because they are widely traded either around the world or among Asia-Pacific
area. The reason why we test these currencies against America is because all of the
data are denoted in U.S. dollar. So we first determined whether IRP exist between
these seven countries and America. From Table 1 we can observe that in Japan, U.K.,
and the Euro zone, we cannot reject the null hypothesis. Thus, according to our result,
we cannot reject that IRP holds between these three countries and the U.S. For the rest
of the observations, Taiwan, Australia, Korea and China, the empirical results tell us
that IRP does not exist between these countries and the U.S. Furthermore, by
observing the estimated coefficients and the respective p value, two countries, China
and Korea, deviated largely from our expectations.
After finding the fact that the results from China and Korea are highly deviated
from IRP theory, we review the original data and find out that interest rate in these
two countries are extremely high. These too countries maintain high interest rates
while most of the major economies are experiencing an era of zero interest rate. The
reasons behind might be government want to attract foreign investors. With a higher
interest rate, they might be able to attract more foreign capitals. After, observed this
phenomenon, we then came up with an idea that we can determine the countries with
the highest and the lowest interest rates, and test the interest rate parity between the
high interest rate countries and low interest rate countries. We expected the result will
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Tab
le 1
OL
S r
egre
ssio
ns:
01/1
995
-03/2
014, N
=230
πππΉ
β¬=
πΌπ
+π½
π1ππ
πβ¬
+π½
π2ππ
( 1+
π)+
π½π3
ππ( 1
+π
β)
ountr
y
T
aiw
an
Aust
rali
a Ja
pan
K
ore
a U
K
Euro
pe
Chin
a A
&JP
K
&JP
C
hin
a&JP
R
squar
e 0.9
860
0.9
995
0.9
959
0.9
203
0.9
820
0.9
895
0.9
245
0.9
976
0.9
671
0.9
392
πΌπ
-0.0
160
(0.6
92
6)
0.0
036
(0.0
905)
-0.0
178
(0.4
728
)
1.5
957
(0.0
002)
0.0
022
(0.7
081
)
-0.0
028
(0.4
418)
0.2
873
(0.0
007
)
-0.0
282
(0.0
548)
-0.2
726
(0.0
000)
0.0
607
(0.3
357
)
π½π1
1.0
032
(0.3
88
5)
0.9
971
(0.0
740)
1.0
030
(0.2
837
)
0.7
819
(0.0
001)
0.9
919
(0.2
150
)
0.9
971
(0.3
567)
0.9
107
(0.0
054
)
1.0
061
(0.0
340)
0.9
084
(0.0
000)
0.9
538
(0.0
228
)
π½π2
0.8
625
(0.0
86
0)
0.9
572
(0.0
376)
1.0
774
(0.2
980
)
-0.2
777
(0.0
082)
0.9
304
(0.2
335
)
0.9
885
(0.4
470)
-3.6
753
(0.0
000
)
0.8
003
(0.1
034)
4.6
296
(0.0
015)
1.4
241
(0.3
021
)
π½π3
-0
.8032
(0.0
46
1)
-1.0
632
(0.0
080)
-0.9
874
(0.6
641
)
-1.9
493
(0.0
000)
-0.8
528
(0.1
195)
-0.8
263
(0.0
706)
-0.3
230
(0.0
001
)
-1.0
143
(0.3
825)
0.3
721
(0.0
016)
1.6
985
(0.0
000
)
also largely deviate from the prediction of IRP. Since there are huge interest rate
differences between these countries, if IRP doesnβt hold, the return from the carry
trade should be large. In the next section, we will calculate the return from the carry
trade.
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After we reviewed the original data, we determined that the countries with the
highest interest are China, Korea and Australia. In contrast, the country with a lowest
interest rate is Japan. As a result, we test the IRP between these three countries which
have a relatively high interest rate and the country with a very low interest rate which
is Japan. All of the exchange rate data are dominated in Japanese Yen.
The outcome was not surprise that in all of the three combinations, we find that
the Interest Rate Parity does not exist. To sum up, according to our experiment, the
Interest Rate Parity does not hold between Taiwan and the U.S., Australia and the U.S.,
Korea and the U.S., as well as China and the U.S. Moreover, IRP does not exist
between Australia and Japan, Korea and Japan, and also China and Japan.
3.3 Portfolio Returns
After proving that the Interest Rate Parity does not hold between some selected
countries, we then want to calculate the actual profit from carry trading. We pick five
combinations of countries and build five portfolios. Each portfolio contains of only
one combination of countries; in other words in one portfolio, we only speculate
between two countries. In this way, we can see between which country combinations,
the carry trade is the most profitable. Figure 2 summarized the results from each
portfolio.
A currency is having a forward premium when πΉπ‘ excess ππ‘. On the other hand,
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a currency is said to be at a forward discount when ππ‘ excess πΉπ‘. The return from the
carry trade using a forward contract can then be written as:
π π‘+1 = (πΉπ‘ β ππ‘+1),
where π π‘+1 is the return of the carry trade form time t to time t+1. This is a comment
way to calculate the profit from the carry trade (e.g. Burnside et al. 2011).When IRP
holds, investors will gain a zero return from the carry trade.
Monthly Return Accumulated Monthly Return
-300
-200
-100
0
100
200
300
400
2002 2003 2005 2006 2008 2009 2011 2012
KOREA to U.S.
-2000
-1500
-1000
-500
0
2002 2004 2006 2008 2010 2012
KOREA to U.S.
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
2002 2003 2005 2006 2008 2009 2011 2012
CHINA to U.S.
-5
0
5
10
15
20
25
2002 2003 2005 2006 2008 2009 2011 2012
CHINA to U.S.
(9)
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Figure 2. In the right column shows the returns of differ periods in each portfolio and
in the left column shows the accumulated returns.
As shown in the Figure 2, three out of five portfolios appear to be profitable. In
portfolios, China to U.S., Australia to Japan and Korea to Japan, both monthly returns
and accumulated returns are positive almost in ever period. For China to U.S., the
carry trade is profitable in most of the observed periods. However, during the period
of global financial crisis, returns become very volatile. Returns in this period of time
-15
-10
-5
0
5
10
15
1995 1997 1999 2001 2004 2006 2008 2010
AUSTRALIA to JAPAN
0
200
400
600
800
1000
1995 1997 2000 2003 2006 2008 2011
AUSTRALIA to JAPAN
-0.03
-0.02
-0.01
0
0.01
0.02
2002 2003 2005 2007 2009 2010 2012
KOREA to JAPAN
0
0.1
0.2
0.3
0.4
2002 2003 2005 2006 2008 2009 2011 2012
KOREA to JAPAN
-2
-1
0
1
2
2002 2003 2005 2006 2008 2009 2011 2012
CHINA to JAPAN
-15
-10
-5
0
5
2002 2003 2005 2006 2008 2009 2011 2012
CHINA to JAPAN
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drop from a historical high level to the lowest point among the periods. But after the
financial crisis the returns bounced back to a positive level again. The accumulated
return of the portfolio China to U.S. is overall positive, despite a slight deduction
between 2008 and 2009. Moreover, the carry trade profit in recent years drop to a
negative level as well.
In respect of the portfolio Australia to Japan, the returns had been volatile.
Nevertheless, according to its accumulated return graph, the carry trade is overall
profitable throughout the covered periods. There is also a sudden drop in returns
around the year of 2008. But this does not affect the profitability of this portfolio over
long investment period.
For the portfolio Korea to Japan, investors can also own an access return. As in
the above two portfolios, there is again a significant drop of return during the global
financial recession. There is also a bounce back of returns after the financial crisis,
and remain at a profitable level. In these three portfolios, China to U.S., Australia to
Japan and Korea to Japan, the results coincide with our expectation. Investors can
earn profits through these portfolios.
For the other two portfolios, Korea to U.S. and China to Japan, the result is
however surprising. Even though IRP does not hold in these countries, we cannot gain
positive returns from carry trading. In respect of the portfolio Korea to U.S., monthly
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returns are negative in most of the covering periods. However, there is a reversal
during the period of financial crisis, the returns during that particular period is
extremely high. Nevertheless after that period, returns first experienced a tremendous
fall and remain at a negative level thereafter.
For the portfolio, China to Japan, the profitability is somehow ambiguous before
the year of 2008. But after the global recession, the accumulated return becomes
negative for a long period until around 2012. However, in more recent periods, the
returns become positive again.
To sum up, investors can earn a positive return in three of our portfolios, because
IRP does not hold in these country combinations. Moreover, we observe that there is a
relationship between abnormal carry trade returns and the financial crisis. The reasons
behind is to be further study.
4. Conclusions
In this study, we test the IRP theory in a direct way. We used empirical data and
multi-regression analysis to test the IRP equation. In four of our seven selected
countries, Taiwan, Australia, Korea and China, IRP is rejected against the U.S. In
contrast, according to the result form regression analysis, IRP do exist between the
other countries and the U.S. These countries are Japan, the U.K. and the Euro zone.
We also selected other countries combinations and test whether IRP exist between
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them. As a result, we also found that IRP does not hold in Australia, Korea and China
against Japan.
After testing the IRP theory between different countries, we construct five
portfolios by comparing gaps on interest rate between countries. We then find that
three of them are profitable. China to U.S., Australia to Japan and Korea to Japan, are
overall profitable during the covered period. As for the portfolio Korea to U.S., the
accumulated returns during the observed period are negative; also monthly returns are
negative in most of the months. The result from the portfolio China to Japan is
however ambiguous. In some times investors could earn profits; however in other
times they would suffer losses. What we also observed is that there is a relationship
between financial crisis and abnormal portfolio returns. The returns during the period
around 2008 become extremely volatile in all of the five portfolios. Nevertheless, the
reasons behind need further study.
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