"Frontmatter". In: Analysis of Financial Time Series

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122 CONDITIONAL HETEROSCEDASTIC MODELScompute c0 = 0.01, p1 = 0.01, th = 0.1, ga = 0.1compute a0 = 0.01, a1 = 0.5maximize(method=bhhh,recursive,iterations=150) garchlnset fv = gvar(t)set resid = epsi(t)set residsq = resid(t)*resid(t)cor(qstats,number=20,span=10) residcor(qstats,number=20,span=10) residsqEXERCISES1. Derive multistep ahead forecasts for a GARCH(1, 2) model at the forecast originh.2. Derive multistep ahead forecasts for a GARCH(2, 1) model at the forecast originh.3. Suppose that r 1 ,...,r n are observations of a return series that follows theAR(1)-GARCH(1, 1) modelr t = µ + φ 1 r t−1 + a t , a t = σ t ɛ t , σ 2t = α 0 + α 1 a 2 t−1 + β 1σ 2t−1 ,where ɛ t is a standard Gaussian white noise series. Derive the conditional loglikelihood function of the data.4. In the previous equation, assume that ɛ t follows a standardized Student-t distributionwith v degrees of freedom. Derive the conditional log likelihood functionof the data.5. Consider the monthly log return of Intel stock from 1973 to 1997. Build aGARCH model for the series and compute 1 to 5-step ahead volatility forecastsat the forecast origin December 1997.6. The file “m-mrk.dat” contains monthly simple returns of Merck stock. There arethree columns—namely, monthly simple returns, years, and months. Transformthe simple returns to log returns.• Is there evidence of ARCH effects in the log returns? Use Ljung–Box statisticsfor the squared returns with 5 and 10 lags of autocorrelation and 5% significancelevel to answer the question.• Use the PACF of the squared log returns to identify an ARCH model for thedata and fit the identified model. Write down the fitted model.7. The file “m-mmm.dat” contains two columns. They are monthly simple returnand date for 3M stock. Transform the returns to log returns.
EXERCISES 123• Is there evidence of ARCH effects in the log returns? Use Ljung–Box statisticswith 5 and 10 lags of autocorrelation and 5% significance level to answer thequestion.• Use the PACF of the squared returns to identify an ARCH model. What is thefitted model?• There are 623 data points. Use the fitted model earlier to predict the volatilitiesfor t = 624 and t = 625 (the forecast origin is 623).• Build a ARCH-M model for the log return series of 3M stock. Test the hypothesisthat the risk premium is zero at the 5% significance level. Draw yourconclusion.• Build an EGARCH model for the log return series of 3M stock. Use the fittedmodel to compute 1- and 2-step ahead volatility forecasts at the forecast originh = 623.8. The file “m-gmsp5099.dat” contains the monthly log returns, in percentages, ofGeneral Motors stock and S&P 500 index from 1950 to 1999. The GM stockreturns are in column 1.• Build a GARCH model with Gaussian innovations for the log returns of GMstock. Check the model and write down the fitted model.• Build a GARCH-M model with Gaussian innovations for the log returns ofGM stock. What is the fitted model?• Build a GARCH model with Student-t distribution with 6 degrees of freedomfor the GM log returns. Check the model and write down the fitted model.• Build a GARCH model with Student-t distribution for the log returns of GMstock, including estimation of the degrees of freedom. Write down the fittedmodel. Let v be the degrees of freedom of the Student-t distribution. Test thehypothesis H o : v = 6versusH a : v ̸= 6, using the 5% significance level.• Build an EGARCH model for the log returns of GM stock. What is the fittedmodel?• Compare all the volatility models obtained for the log returns of GM stock. Isthere any significant difference? Why?9. Again, consider the file “m-gmsp5099.dat.”• Build a Gaussian GARCH model for the monthly log returns of S&P 500index. Check the model carefully.• Is there a Summer effect on the volatility of the index return? Use the GARCHmodel built in part (a) to answer this question.• Are lagged returns of GM stock useful in modeling the index volatility? Again,use the GARCH model of part (a) as a baseline model for comparison.
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Analysis of FinancialTime SeriesFin
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ContentsPrefacexi1. Financial Time
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CONTENTSix6.6 Black-Scholes Pricing
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PrefaceThis book grew out of an MBA
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Analysis of Financial Time Series.
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ASSET RETURNS 3Multiperiod Simple R
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ASSET RETURNS 5r t [k] =ln(1 + R t
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DISTRIBUTIONAL PROPERTIES OF RETURN
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10 FINANCIAL TIME SERIES AND THEIR
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REFERENCES 21Federal Reserve Bank o
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CORRELATION AND AUTOCORRELATION FUN
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CORRELATION AND AUTOCORRELATION FUN
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WHITE NOISE AND LINEAR TIME SERIES
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SIMPLE AUTOREGRESSIVE MODELS 29whic
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SIMPLE AUTOREGRESSIVE MODELS 31wher
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SIMPLE AUTOREGRESSIVE MODELS 33wher
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SIMPLE AUTOREGRESSIVE MODELS 35expa
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SIMPLE AUTOREGRESSIVE MODELS 37Tabl
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SIMPLE AUTOREGRESSIVE MODELS 39Mode
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SIMPLE AUTOREGRESSIVE MODELS 41The
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SIMPLE MOVING-AVERAGE MODELS 43wher
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SIMPLE MOVING-AVERAGE MODELS 45s-rt
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SIMPLE MOVING-AVERAGE MODELS 47The
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SIMPLE ARMA MODELS 49A time series
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SIMPLE ARMA MODELS 51operator, the
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SIMPLE ARMA MODELS 53Table 2.5. Sam
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SIMPLE ARMA MODELS 55This represent
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UNIT-ROOT NONSTATIONARITY 57ˆp h (
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UNIT-ROOT NONSTATIONARITY 59log-pri
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SEASONAL MODELS 61which is commonly
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SEASONAL MODELS 63Series : xSeries
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SEASONAL MODELS 65models use the sa
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• ••• •••••••
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REGRESSION MODELS WITH TIME SERIES
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Page 81 and 82: LONG-MEMORY MODELS 73=(k − d −
Page 83 and 84: APPENDIX A: SOME SCA COMMANDS 75est
Page 85 and 86: EXERCISES 77relation. Draw your con
Page 87 and 88: Analysis of Financial Time Series.
Page 89 and 90: STRUCTURE OF A MODEL 813.2 STRUCTUR
Page 91 and 92: THE ARCH MODEL 83corrected asset re
Page 93 and 94: THE ARCH MODEL 85Series : xACF0.0 0
Page 95 and 96: THE ARCH MODEL 87sample mean from t
Page 97 and 98: THE ARCH MODEL 89where Ɣ(x) is the
Page 99 and 100: THE ARCH MODEL 91Series : resiSerie
Page 101 and 102: THE GARCH MODEL 93other softwares a
Page 103 and 104: THE GARCH MODEL 95ahead forecast ca
Page 105 and 106: THE GARCH MODEL 97The fitted AR(3)
Page 107 and 108: THE GARCH MODEL 99Series : stdatACF
Page 109 and 110: THE GARCH-M MODEL 101two models. Th
Page 111 and 112: THE EXPONENTIAL GARCH MODEL 103To b
Page 113 and 114: THE EXPONENTIAL GARCH MODEL 105eros
Page 115 and 116: THE CHARMA MODEL 107ˆσ 2 864 (3)
Page 117 and 118: RANDOM COEFFICIENT AUTOREGRESSIVE M
Page 119 and 120: THE LONG-MEMORY STOCHASTIC VOLATILI
Page 121 and 122: AN ALTERNATIVE APPROACH 113where Va
Page 123 and 124: APPLICATION 115(a) IBMlog-rtn-30 -1
Page 125 and 126: APPLICATION 117equationThe fitted m
Page 127 and 128: KURTOSIS OF GARCH MODELS 119where K
Page 129: SOME RATS PROGRAMS FOR ESTIMATING V
Page 133 and 134: REFERENCES 125Melino, A., and Turnb
Page 135 and 136: NONLINEAR TIME SERIES 127To put non
Page 137 and 138: NONLINEAR MODELS 129Example 4.1. Co
Page 139 and 140: NONLINEAR MODELS 131jumps when it b
Page 141 and 142: NONLINEAR MODELS 133the series and
Page 143 and 144: NONLINEAR MODELS 135els to the mont
Page 145 and 146: NONLINEAR MODELS 137growth-2 -1 0 1
Page 147 and 148: NONLINEAR MODELS 139average of y t
Page 149 and 150: NONLINEAR MODELS 141indicating that
Page 151 and 152: NONLINEAR MODELS 143s T,2t=1T∑K h
Page 153 and 154: NONLINEAR MODELS 145f i (.) of Eq.
Page 155 and 156: NONLINEAR MODELS 1474.1.9.1 Feed-Fo
Page 157 and 158: NONLINEAR MODELS 1494.1.9.2 Trainin
Page 159 and 160: NONLINEAR MODELS 151prob0.0 0.2 0.4
Page 161 and 162: NONLINEARITY TESTS 153idea behind v
Page 163 and 164: NONLINEARITY TESTS 155C l (δ, T )
Page 165 and 166: NONLINEARITY TESTS 157and obtain th
Page 167 and 168: NONLINEARITY TESTS 159• Step 2: C
Page 169 and 170: FORECASTING 161returns. In summary,
Page 171 and 172: FORECASTING 163in m 11 and m 22 ind
Page 173 and 174: APPLICATION 165unem. rate4 6 8 10
Page 175 and 176: APPLICATION 167Table 4.4. Out-of-Sa
Page 177 and 178: APPENDIX A 169compute a0 = 0.1, a1
Page 179 and 180: REFERENCES 171P(s t = 2 | s t−1 =
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REFERENCES 173Fan, J. (1993), “Lo
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NONSYNCHRONOUS TRADING 177t − k t
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BID-ASK SPREAD 179The lag-1 autocov
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EMPIRICAL CHARACTERISTICS 181The ma
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n(trades)0 20406080 1200 1000 2000
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EMPIRICAL CHARACTERISTICS 185after-
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MODELS FOR PRICE CHANGES 187deep un
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MODELS FOR PRICE CHANGES 189σ 2i (
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MODELS FOR PRICE CHANGES 191A i = 1
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MODELS FOR PRICE CHANGES 193( )piln
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DURATION MODELS 195For the IBM data
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DURATION MODELS 197(a) is the avera
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DURATION MODELS 199actions might no
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DURATION MODELS 201Series : xACF0.0
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DURATION MODELS 203reduces to that
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DURATION MODELS 205Series : xACF0.0
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THE PCD MODEL 207where w(α) denote
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THE PCD MODEL 209(a) All transactio
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THE PCD MODEL 2110 10 20 30 40 500
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THE PCD MODEL 213⎧⎪⎨1f (x |
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THE PCD MODEL 215Generalized Gamma
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THE PCD MODEL 217smpl 2 3534compute
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REFERENCES 219(a) Use the data to c
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STOCHASTIC PROCESSES 223write a con
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STOCHASTIC PROCESSES 2253. stationa
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ITO’S LEMMA 2276.3.2 Stochastic D
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ITO’S LEMMA 229This result shows
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DISTRIBUTIONS OF PRICE AND RETURN 2
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BLACK-SCHOLES EQUATION 233and G t =
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BLACK-SCHOLES FORMULA 235risk prefe
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BLACK-SCHOLES FORMULA 237The stock
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BLACK-SCHOLES FORMULA 239(a) Call o
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AN EXTENSION OF ITO’S LEMMA 2410
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STOCHASTIC INTEGRAL 243using the It
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JUMP DIFFUSION MODELS 245where w t
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JUMP DIFFUSION MODELS 247where it i
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JUMP DIFFUSION MODELS 249sudden jum
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APPENDIX A 251Pricing formulas for
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EXERCISES 253which involves the CDF
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REFERENCES 255Bakshi, G., Cao, C.,
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VALUEATRISK 257log return-0.2 -0.1
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RISKMETRICS 259we use log returns r
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RISKMETRICS 261investor is$10,000,0
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ECONOMETRIC APPROACH TO VAR 263Cons
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ECONOMETRIC APPROACH TO VAR 265The
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QUANTILE ESTIMATION 267Using the fo
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QUANTILE ESTIMATION 269ˆx 0.01 = p
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EXTREME VALUE THEORY 271= 1 −= 1
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EXTREME VALUE THEORY 273shows that
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EXTREME VALUE THEORY 275{ [] }r n(i
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EXTREME VALUE THEORY 2777.5.3 Appli
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EXTREME VALUE TO VAR 2797.6 AN EXTR
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EXTREME VALUE TO VAR 281VaR =−2.5
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EXTREME VALUE TO VAR 283stock. The
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A NEW APPROACH TO VAR 285series (e.
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A NEW APPROACH TO VAR 287In Eq. (7.
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A NEW APPROACH TO VAR 289Example 7.
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A NEW APPROACH TO VAR 291feature is
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A NEW APPROACH TO VAR 293(a) Homoge
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A NEW APPROACH TO VAR 295Table 7.4.
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REFERENCES 297a Gaussian GARCH(1, 1
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CROSS-CORRELATION 301correlation co
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CROSS-CORRELATION 303where ̂D is t
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CROSS-CORRELATION 305Table 8.1. Sum
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30yr20yr10yr5yr1yr-10 0 510-10 0 51
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VAR MODELS 3098.2 VECTOR AUTOREGRES
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VAR MODELS 311where G = Cov(b t ).
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VAR MODELS 313where φ 0 and a t ar
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VAR MODELS 315To specify the order
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VAR MODELS 317the S&P 500 index. Th
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VECTOR MA MODELS 319[ ] [ ] [ ] [r1
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VECTOR MA MODELS 321turn used to co
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VECTOR ARMA MODELS 323For the VAR(1
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VECTOR ARMA MODELS 325log-rate0.0 0
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VECTOR ARMA MODELS 327interest-rate
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CO-INTEGRATION 329Series : x1ACF0.0
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CO-INTEGRATION 331Stock Exchange; o
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THRESHOLD CO-INTEGRATION 333ously b
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PRINCIPAL COMPONENT ANALYSIS 3358.6
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PRINCIPAL COMPONENT ANALYSIS 337(c
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PRINCIPAL COMPONENT ANALYSIS 339(a)
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FACTOR ANALYSIS 341(a) 5 stock retu
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FACTOR ANALYSIS 343andCov(r, F) = E
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FACTOR ANALYSIS 345matrix P to tran
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FACTOR ANALYSIS 347Example 8.9. In
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APPENDIX A. REVIEW OF VECTORS AND M
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APPENDIX A. REVIEW OF VECTORS AND M
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APPENDIX B. MULTIVARIATE NORMAL DIS
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REFERENCES 355(b) Build a bivariate
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REPARAMETERIZATION 359To illustrate
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REPARAMETERIZATION 361where ⊥ den
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GARCH MODELS FOR BIVARIATE RETURNS
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VECTOR VOLATILITY MODELS 377using t
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VECTOR VOLATILITY MODELS 379large-c
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VECTOR VOLATILITY MODELS 381(a) S&P
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FACTOR-VOLATILITY MODELS 383conside
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APPLICATION 385[ ]σ11,t=σ 22,t⎡
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MULTIVARIATE t DISTRIBUTION 387σ 1
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APPENDIX A. SOME REMARKS ON ESTIMAT
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APPENDIX A. SOME REMARKS ON ESTIMAT
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REFERENCES 393(a) Compute the sampl
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GIBBS SAMPLING 397mean adding auxil
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BAYESIAN INFERENCE 399distributions
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BAYESIAN INFERENCE 401normal with m
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ALTERNATIVE ALGORITHMS 403distribut
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ALTERNATIVE ALGORITHMS 40510.4.2 Me
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REGRESSION WITH SERIAL CORRELATIONS
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REGRESSION WITH SERIAL CORRELATIONS
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MISSING VALUES AND OUTLIERS 411y h
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MISSING VALUES AND OUTLIERS 413Cons
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MISSING VALUES AND OUTLIERS 415we h
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MISSING VALUES AND OUTLIERS 417c3t-
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STOCHASTIC VOLATILITY MODELS 419tha
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STOCHASTIC VOLATILITY MODELS 421whe
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STOCHASTIC VOLATILITY MODELS 423den
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STOCHASTIC VOLATILITY MODELS 425The
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STOCHASTIC VOLATILITY MODELS 427(a)
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•••MARKOV SWITCHING MODELS 42
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MARKOV SWITCHING MODELS 431(a) GARC
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MARKOV SWITCHING MODELS 433β i ∼
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MARKOV SWITCHING MODELS 435(a) mont
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MARKOV SWITCHING MODELS 437α ij ar
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FORECASTING 439garchrtn-sq0 200 400
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EXERCISES 441eter uncertainty in pr
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REFERENCES 443Justel, A., Peña, D.
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446 INDEXData (cont.)equal-weighted
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448 INDEXPoisson process, 244inhomo
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