On expiry, if the share price goes up to Rs 130, then you would earn Rs 30 from the share and lose Rs 10 from the future, leaving you with a net profit of Rs 20.
However, if on expiry, the share drops to Rs 90, then you would lose Rs 10, and make Rs 30 from the future. That would leave you with a total gain of gain of Rs 20. You should remember that on the expiry date, the spot and future prices converge leaving you with no arbitrage opportunity.
As a category, derivative funds have turned in superior returns as compared to other debt categories. According to Mehta, JM Mutual's Equity & Derivative fund has given an annualised return of 6.09 per cent since inception in February 2005.
Sanjiv Shah, Chief investment officer of Benchmark Mutual Fund, which was the first one to launch a derivative fund in December 2004, says "Derivative funds have given good returns compared to fixed income funds. Earlier there was a stipulation that the maximum derivatives position a fund could take was 50 per cent of its asset size."
"Now there is no restriction on the amount arbitrage funds can invest in derivatives. (They can engage in arbitrage activity unto 75-80 per cent of the asset size.) We expect derivative funds to do well going forward. The volatility in these funds is not much since they don't take interest rate risks," he adds.
The tax treatment for a derivative fund is similar to that for an income fund. For the growth option, long-term capital gains is zero, while the short-term capital gains is 10 per cent. For the dividend option, the dividend distribution tax is 12.50 per cent plus surcharge.
Those who hold for over a year are eligible for indexation benefits. The average category return amounted to 3.06 per cent, while income funds returned 2.71 per cent during the six month period.