Risk-Reward Ratio
The ratio of the maximum potential profit to the maximum potential loss in a derivatives strategy, used to evaluate whether the prospective reward justifies the risk taken per unit of capital deployed.
The risk-reward ratio was one of the most fundamental evaluation criteria for any trading strategy, but its application in derivatives differed meaningfully from equity investing due to the defined payoff structures of options. In equity investing, both risk and reward were theoretically open-ended. In many options strategies, however, both the maximum profit and maximum loss were bounded by the structure of the position, making the risk-reward ratio straightforward to compute.
For a debit spread — such as a bull call spread where a trader bought a lower-strike call and sold a higher-strike call — the maximum profit was the difference between the two strikes minus the net premium paid. The maximum loss was the net premium paid. If a trader paid Rs 50 for a Rs 200-wide spread (buying 22,000 call, selling 22,200 call), the maximum reward was Rs 150 and the maximum risk was Rs 50, giving a risk-reward ratio of 3:1 (three rupees of potential profit for each rupee at risk).
For credit strategies — such as short put spreads or iron condors — the ratio was inverted. A short put spread might collect Rs 50 in premium while risking Rs 150 (the width of the spread minus premium collected), yielding a risk-reward of 1:3. The trader accepted an unfavourable risk-reward in exchange for a higher probability of profit — because the position profited as long as the underlying remained above the short put strike, a more frequent outcome than the bull call spread reaching full profit.
The interplay between risk-reward and probability of profit was central to options strategy selection. High probability trades (selling far OTM options) had poor risk-reward ratios by design; low probability trades (buying far OTM options) had attractive risk-reward but low hit rates. Traders evaluated expected value — probability of profit multiplied by average profit minus probability of loss multiplied by average loss — as the more complete metric.
In India's exchange-traded derivatives, SEBI's requirement for defined margin for option spreads (portfolio margining) encouraged traders to use defined-risk structures rather than naked positions, making risk-reward calculations more tractable and transparent.