Google taught my options mentoring students a nice lesson on getting long premium into earnings; it usually pays to play the day before earnings, not the day of. Because the ATM straddle that was purchased on Wednesday was a huge winner, while the ATM straddle purchased yesterday was a loser. Thankfully, most students actually had on the long calendar we looked at during the pit report, so they all came out ahead.
Typically, after earnings, we will see implied volatility come out of a stock's options. This is because what was once unknown is now known. When there is less uncertainty, there is less volatility. And on Google’s move today, we can clearly see that volatility fell:
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