On the call side, Boise Inc. (NYSE:BZ) calls are trading close to 9 times their average volume ahead of their quarterly earnings report this week. Harmony Gold Mining (NYSE:HMY) calls are also very active today, trading around 7 times their average amount as investors are generally bullish on the mining sector today. LyondellBasell (NYSE:LYB) calls are trading at 5 times their average amount after reporting better than expected earnings results. ATP Oil & Gas (NASDAQ:ATPG) calls are not far behind, trading at close to 4.5 times their average volume. Finally, Motorola Solutions (NYSE:MSI) calls close out the list at just under 4 times their normal volume after several investors placed bullish bets on the company.Taking a look at the put side of the ledger, OmniVision Technologies (NASDAQ:OVTI) puts are currently trading around 13 times their average volume after one investor placed a bearish bet on the company. D.R. Horton(NYSE:DHI) puts are also very active today, trading at 6.2 times their average volume as new home sales continue to be slow. Cavium (NASDAQ:CAVM) puts are also very active today, trading just over 5 times their average volume. Garmin (NASDAQ:GRMN) puts are trading just under 5 times their average volume ahead of their quarterly earnings report this week. Finally, Lockheed Martin (NYSE:LMT) puts close out the list at 4 times their average volume as investor are bracing for government cuts in defense spending.