Originally posted by Nika
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Selling a 550 July call does partly finance buying the 450 Jan call because currently the 550 call is almost all time value and the 450 call is almost all intrinsic value. There is no risk if the stock shoots up, because when an option goes in the money it loses time value and gains intrinsic value (which is matched by the intrinsic value of the lower 450 option.
That sounds confusing but it works like this. You buy the 450 for $112 and sell the 550 for $39. You pay a total of $73. With apple at 550 the 450 has $12 of time value and $100 of intrinsic value. The 550 has $39 of time value and $0 intrinsic value. If Apple shoots up to $600, the 450 will have at least $150 of intrinsic value and the time value will drop to about $5, thus the option will be selling for $155. The 550 option will have $50 of intrinsic value and the time value will drop to about $20 thus it will be selling for $70. Thus while you lose $31 on the 550 option you are short, you gain $43 on the $450 option. If you sell the whole spread early, you would get about $85. You paid $73, so you made $12, or a return of 16%. If this happens right after earnings you can grab that money and re-invest it in other stocks. If you keep doing this your annualized return would be around 500%.
Thus you can see that it is not a bad thing for the stock to shoot up way past your short strike. You can also choose to hold the spread until July, at which point the $550 and the $450 will be exercised and you get $100, representing a $27 return on your $73 investment in 6 months (not really as good as the above $12 return in less than a month).
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