A delta-neutral spread composed of more long options than short options on the same underlying instrument. This position generally profits from a large movement in either direction in the underlying instrument.
Spread: A trade in which two related contracts/stocks/bonds/options are traded to exploit the relative difference in price change between the two. A trading strategy in which a trader offsets the purchase of one trading unit against another.
Ratio Backspread: A delta neutral spread where an uneven amount of contracts are bought and sold with a ratio less than 2 to 3. Optimally no net credit or net debit occurs.