I closed the Amazon Feb $65 puts last Wed, when I saw the stock dropped to around $68, which is the low point the day after it released Q4 earning.
Lesson learned:
1) short/put a stock is much harder than I thought. I started this trade because I saw EDU, AAPL, and VMW all dropped big after missing earning. But I have hind-sight bias on them: things are always clearer on rear view mirror. I did not know EDU will issue a so-so guidance for this Q; I did not know iPod suddenly stopped growth, iPhone did not sell as fast as Steve wanted, and Mac computers are expensive considering consumer slow down.
