The SPDR S&P 500 Fund (SPY) has 642,000 traded, 410,000 of which are puts. Next up are the S&P 500 Index (SPX) options with 296,000, of which 168,000 are puts. Just behind are the CBOE Volatility Index (VIX) options at 293,000, dominated by 238,000 calls.
The iShares Russell 2000 Fund (IWM) has 179,000 contracts changing hands and a put/call ratio of more than 2 to 1. The PowerShares QQQ Trust (QQQ) options follow with volume of 163,000 and slightly more puts than calls.
The iPath S&P 500 VIX Short-Term Futures ETN (VXX) has seen 89,000 options turn over, evenly split between calls and puts. The iShares Emerging Markets Fund (EEM) has 74,000 options traded, with a put/call ratio of 2 to 1.
