risk management chap 8 interest rate risk i
DESCRIPTION
bahan ujian berkala 1 indonesia banking schoolTRANSCRIPT
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Interest Rate Risk IInterest Rate Risk I
Chapter 8
© 2008 The McGraw-Hill Companies, Inc., All Rights Reserved.McGraw-Hill/Irwin
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Overview
This chapter discusses the interest rate risk associated with financial intermediation: Federal Reserve monetary policy Repricing model Maturity model Duration model *Term structure of interest rate risk *Theories of the term structure of interest
rates
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Loanable Funds Theory
Interest rates reflect supply and demand for loanable funds
Shifts in supply or demand generate interest rate movements as market forces establish a new equilibrium
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Determination of Equilibrium Interest Rates
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Level & Movement of Interest Rates
Federal Reserve Bank: U.S. central bank Open market operations influence money
supply, inflation, and interest rates Actions of Fed in response to 2001 attacks on
World Trade Center Lowered interest rates 11 times during the year
June 2004- August 2006 inflation concerns take prominence 17 consecutive increases in interest rates
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Central Bank and Interest Rates
Target is primarily short term rates Focus on Fed Funds Rate in particular
Interest rate changes and volatility increasingly transmitted from country to country Statements by Ben Bernanke can have
dramatic effects on world interest rates.
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Repricing Model
Repricing or funding gap model based on book value.
Contrasts with market value-based maturity and duration models recommended by the Bank for International Settlements (BIS).
Rate sensitivity means time to repricing. Repricing gap is the difference between the
rate sensitivity of each asset and the rate sensitivity of each liability: RSA - RSL.
Refinancing risk
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Maturity Buckets
Commercial banks must report repricing gaps for assets and liabilities with maturities of: One day. More than one day to three months. More than 3 three months to six months. More than six months to twelve months. More than one year to five years. Over five years.
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Repricing Gap Example
Assets Liabilities Gap Cum. Gap
1-day $ 20 $ 30 $-10 $-10
>1day-3mos. 30 40 -10 -20
>3mos.-6mos. 70 85 -15 -35
>6mos.-12mos. 90 70 +20 -15
>1yr.-5yrs. 40 30 +10 -5
>5 years 10 5 +5 0
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Applying the Repricing Model
NIIi = (GAPi) Ri = (RSAi - RSLi) Ri
Example: In the one day bucket, gap is -$10 million. If rates
rise by 1%,
NII(1) = (-$10 million) × .01 = -$100,000.
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Applying the Repricing Model
Example II:
If we consider the cumulative 1-year gap,
NII = (CGAPone year) R = (-$15 million)(.01)
= -$150,000.
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Rate-Sensitive Assets
Examples from hypothetical balance sheet: Short-term consumer loans. If repriced at year-
end, would just make one-year cutoff. Three-month T-bills repriced on maturity every
3 months. Six-month T-notes repriced on maturity every 6
months. 30-year floating-rate mortgages repriced (rate
reset) every 9 months.
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Rate-Sensitive Liabilities
RSLs bucketed in same manner as RSAs. Demand deposits and passbook savings
accounts warrant special mention. Generally considered rate-insensitive (act as
core deposits), but there are arguments for their inclusion as rate-sensitive liabilities.
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CGAP Ratio
May be useful to express CGAP in ratio form as,
CGAP/Assets. Provides direction of exposure and Scale of the exposure.
Example: CGAP/A = $15 million / $270 million = 0.56, or
5.6 percent.
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Equal Rate Changes on RSAs, RSLs
Example: Suppose rates rise 2% for RSAs and RSLs. Expected annual change in NII,
NII = CGAP × R
= $15 million × .01
= $150,000 With positive CGAP, rates and NII move in
the same direction. Change proportional to CGAP
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Unequal Changes in Rates
If changes in rates on RSAs and RSLs are not equal, the spread changes. In this case,
NII = (RSA × RRSA ) - (RSL × RRSL )
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Unequal Rate Change Example
Spread effect example:
RSA rate rises by 1.2% and RSL rate rises by 1.0%
NII = interest revenue - interest expense
= ($155 million × 1.2%) - ($155 million × 1.0%)
= $310,000
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Restructuring Assets & Liabilities
The FI can restructure its assets and liabilities, on or off the balance sheet, to benefit from projected interest rate changes. Positive gap: increase in rates increases NII Negative gap: decrease in rates increases NII Example: Macatawa Bank’s one-year repricing
gap ratio of -5.23 percent. Effect of rising interest rates in 2006: Bad luck? Or Bad Management?
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Weaknesses of Repricing Model
Weaknesses: Ignores market value effects and off-balance
sheet (OBS) cash flows Overaggregative
Distribution of assets & liabilities within individual buckets is not considered. Mismatches within buckets can be substantial.
Ignores effects of runoffs Bank continuously originates and retires consumer
and mortgage loans. Runoffs may be rate-sensitive.
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*The Maturity Model
Explicitly incorporates market value effects. For fixed-income assets and liabilities:
Rise (fall) in interest rates leads to fall (rise) in market price.
The longer the maturity, the greater the effect of interest rate changes on market price.
Fall in value of longer-term securities increases at diminishing rate for given increase in interest rates.
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Maturity of Portfolio*
Maturity of portfolio of assets (liabilities) equals weighted average of maturities of individual components of the portfolio.
Principles stated on previous slide apply to portfolio as well as to individual assets or liabilities.
Typically, maturity gap, MA - ML > 0 for most banks and thrifts.
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*Effects of Interest Rate Changes
Size of the gap determines the size of interest rate change that would drive net worth to zero.
Immunization and effect of setting
MA - ML = 0.
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*Maturities and Interest Rate Exposure
If MA - ML = 0, is the FI immunized? Extreme example: Suppose liabilities consist of
1-year zero coupon bond with face value $100. Assets consist of 1-year loan, which pays back $99.99 shortly after origination, and 1¢ at the end of the year. Both have maturities of 1 year.
Not immunized, although maturity gap equals zero.
Reason: Differences in duration**
**(See Chapter 9)
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*Maturity Model
Leverage also affects ability to eliminate interest rate risk using maturity model Example:
Assets: $100 million in one-year 10-percent bonds, funded with $90 million in one-year 10-percent deposits (and equity)
Maturity gap is zero but exposure to interest rate risk is not zero.
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*Duration
The average life of an asset or liability The weighted-average time to maturity
using present value of the cash flows, relative to the total present value of the asset or liability as weights.
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*Term Structure of Interest Rates
Time to Maturity
Time to Maturity
Time to Maturity
Time to Maturity
YTMYTM
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*Unbiased Expectations Theory
Yield curve reflects market’s expectations of future short-term rates.
Long-term rates are geometric average of current and expected short-term rates._ _ ~ ~
RN = [(1+R1)(1+E(r2))…(1+E(rN))]1/N - 1
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*Liquidity Premium Theory
Allows for future uncertainty. Premium required to hold long-term.
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*Market Segmentation Theory
Investors have specific needs in terms of maturity.
Yield curve reflects intersection of demand and supply of individual maturities.
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Pertinent Websites
For information related to central bank policy, visit:
Bank for International Settlements: www.bis.org
Federal Reserve Bank: www.federalreserve.gov