Front Ratio Spread
A Front Ratio Spread is an options strategy in which more options are sold than bought at different strikes, creating a net short vega, theta-positive position that profits from a small directional move toward the short strikes, with the risk of large losses if the underlying moves far beyond them.
The Front Ratio Spread (sometimes called simply a ratio spread) is the mirror image of the ratio backspread. Instead of buying more than selling, the trader sells more than buys. A typical structure involves buying one at-the-money call and selling two or three out-of-the-money calls, or buying one at-the-money put and selling two or three out-of-the-money puts.
The position profits most when the underlying moves moderately toward the short strikes and settles there at expiration. In a call front ratio spread, the maximum profit zone is centered around the short call strike, where the bought call is fully in the money and the extra short calls are at the money — capturing the maximum spread profit on one side while the extra short call is at its highest value without being fully in the money.
Front ratio spreads can often be entered for a net credit because the premium from selling two or three options at the short strike exceeds the cost of buying one at a closer strike. This credit provides a buffer against adverse moves and means the position can be profitable even if the directional thesis is wrong, as long as the underlying does not move past the danger zone.
The critical risk is the naked exposure from the extra short options. In a 1x2 call front ratio spread, one of the two short calls is uncovered. If the stock rallies sharply, this uncovered call can generate unlimited losses in theory. Traders manage this by defining a maximum loss threshold and closing the position if the underlying threatens to break through the short strikes.
Implied volatility is the enemy of a front ratio spread. Since the position is net short vega, a volatility spike hurts the position even before the underlying moves. For this reason, front ratio spreads are most effectively initiated in low-volatility environments or after a volatility spike has already occurred and is expected to normalize.
Many professional traders use front ratio spreads as an alternative to vertical spreads when they want to collect premium while still maintaining some directional participation without paying a net debit.