This document discusses options trading in the last 30 days before expiration. It notes that options devalue fastest in this period, but there can also be high profits if the underlying stock moves significantly. The document uses examples from SPY and CNO options to show how options prices near expiration can increase over 600% in a single day if the stock price moves in the right direction. However, it also warns that losses can be large if the expected move does not occur. The last 30 days are considered a risky but potentially profitable period for options trading.