Why this structure behaves this way
Put Ratio Backspread is shaped by negative delta and long vega exposure
Extra long puts give net positive gamma and vega below the strike — the position benefits from a sharp drop and rising IV. Theta bleeds against you while the stock sits between strikes.
This page uses the catalog’s illustrative default legs so you can compare direction, time, and volatility effects in one place. Edit the assumptions above to test a different starting point.