backspread การใช้

The loss taken per put backspread combination can be expressed as:
An illustration of the put backspread, placed for a net credit, showing the overall profit / loss of the position at expiry ( solid black line ) and sometime before expiry with different levels of implied volatility ( dashed blue lines, darker = higher volatility ).
For equity markets ( as described above ), the call backspread does not generally offer these helpful dynamics because the generally associated changes in volatility as price moves in the equity markets may exacerbate losses on a bearish move and reduce profits on a bullish move in the underlying.
The "'call backspread "'( reverse call ratio spread ) is a bullish strategy in options trading whereby the options trader writes a number of call options and buys more call options of the same underlying stock and expiration date but at a higher strike price.
The "'put backspread "'is a strategy in options trading whereby the options trader writes a number of put options at a higher strike price ( often at-the-money ) and buys a greater number ( often twice as many ) of put options at a lower strike price ( often out-of-the-money ) of the same underlying stock and expiration date.