Ratio Spread

What is Ratio Spread?

Ratio Spread A ratio spread is an options structure where the trader buys and sells unequal numbers of options at different strikes, typically with the same expiration. The most common form is the call ratio spread: buy 1 ATM call, sell 2 OTM calls. The 1:2 ratio creates a structure that profits from limited upward movement but has unlimited upside risk if the underlying rallies past the short strikes. Common ratio configurations: - **Call ratio spread (bullish-neutral)**: Buy 1 lower-strike call, sell 2 higher-strike calls. Profits if underlying moves moderately up; max profit at the short strike. - **Put ratio spread (bearish-neutral)**: Buy 1 higher-strike put, sell 2 lower-strike puts. Profits if underlying moves moderately down; max profit at the short strike. - **Ratio backspread**: Reverse — sell 1 ATM, buy 2 OTM. Profits on large moves in the direction of the buy strikes; loses on small adverse moves. Mechanics of a typical 1:2 call ratio spread: - Buy 1 ATM call for $4.00 ($400) - Sell 2 OTM calls at higher strike for $1.50 each ($300 total credit) - Net debit: $100 ($1.00 per spread) - Max profit: realized at the short strike. Long call appreciates as stock rises; both short calls lose value (good for the trader). Above the short strike, the second short call creates an uncovered upside obligation — unlimited risk if not closed. The structure is essentially a vertical spread with an extra short option on top. The extra short creates the "ratio" — and the asymmetric risk. Risk profile: - **Below the long strike**: max loss = net debit paid. The long call expires worthless; the shorts expire worthless. Lose the premium paid. - **Between the long and short strikes**: progressively profitable. Long call appreciates; shorts decay. - **At the short strike**: maximum profit. The shorts are at zero intrinsic; the long has appreciated significantly. - **Above the short strike**: profit declines and eventually goes negative. The extra short call's intrinsic grows faster than the long call's, creating uncovered upside exposure. - **Far above the short strike**: theoretically unlimited losses (similar to a naked short call). When ratio spreads work: - **Moderate directional move**: when you expect the stock to move to the short strike but not far past it. - **High IV environment**: the extra short collects more premium in high-IV regimes. - **Skew arbitrage**: when the OTM options are richly priced relative to ATM options, ratio spreads exploit the mispricing. When ratio spreads fail: - **Strong directional moves**: blow past the short strikes, converting modest profits into large losses. - **News-driven gaps**: overnight moves don't allow time to close the extra short. - **Wrong direction**: if the stock moves opposite the bias, max loss is realized. Ratio spreads are advanced structures requiring active management. The asymmetric risk profile makes them similar to selling naked options — most retail traders should size very small (5-10% of normal position size) or avoid them entirely. For risk-managed alternatives, consider butterflies (defined-risk equivalent of a ratio spread when wings are added) or vertical spreads (defined-risk directional with no extra short).