Quote from jgiasi:
Can anyone advise as to how large a move is needed (up or down) for an at the money straddle(simuntaneous buy of both a put and a call) on the SPY to become profitable.
Thanks, Jennie
The answer to your question of course depends on the time and if not at expiration, then the IV.
Purely at expiration, the move simply needs to be large enough to cover the costs of the put and the call. A quick example should make it easy to understand:
Stock XYZ is at $50
50 strike call for a given time costs $300
50 strike put for a given time costs $250
Straddle cost = $550
Stock must then move > 5.5 points away from $50 for the straddle to be in the money at expiration.
i.e. - stock is at $55.50 - call and straddle will be worth $550
i.e. - stock is at $56.00 - call and straddle will be worth $600
i.e. - stock is at $44.50 - put and straddle will be worth $550
i.e. - stock is at $44.00 - put and straddle will be worth $600
So, at expiration, the stock needs to move the number of points that the put + call combined to cost plus just a bit more to profit. Obviously a bigger move results in bigger profits.
Before expiration, a smaller move can make a straddle profitable, or theoretically even no move if IV (Implied Volatility) increases enough.
It's often not considered wise to hold a straddle all the way to expiration - most straddle holders I think tend to use "time stops" to close a position before time expires on them and if a stock makes a huge move on a given day, then they take profits on that day (not necessarily of course).
JJacksET4