Put activity ramped up on Clean Energy Fuels Corp. (NASDAQ:CLNE) last Friday with 2 169 contracts changing hands -- about 1.68 times the stock's average daily volume. By contrast only 338 calls crossed the tape representing just 15% of the norm. The day's most active strike was the March 13 put where 1 159 contracts were traded. The majority of these options crossed at the ask price indicating they were purchased and open interest here rose over the weekend by 990 contracts. In other words it's a safe bet that new puts were bought to open at this strike ...