Smith holds a long position for a Stock index futures contract which is four months from maturity. A stock index currently stands at 350. The risk-free interest rate is 8% per annum (with continuous compounding) and the dividend yield on the index is 4% per annum.
a) What should the futures price for a four-month contract be?
b) Suppose one month later the stock price is 351. The dividend yield and index are the same. What is the value of the contract now?
Current value of stock index, S0 = 350
risk free rate , r= 8%
dividend yield , d= 4%
where m = no. of compounding periods in 1 year
maturity of contract , T= 4 months
Future price = S0*[e(r - d)*(T/12)] = 350*[e(0.08-0.04)*(4/12)] = 350*1.013422619 = 354.697916 or 354.70 ( rounding off to 2 decimal places)
b) S0 = 350
T = 3
Future price = S0*[e(r - D)*(T/12)] = 350*[e(0.08-0.0392207)*(3/12)] = 350*1.010050167 = 353.51755848 or 353.52 ( rounding off to 2 decimal places)
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