Option Activity Alert: Betting Against a Breakout for BP plc

Buy-to-open put volume is on the rise as the stock shies away from a popular call strike

by Elizabeth Harrow (eharrow@sir-inc.com) 9/29/2009 12:04 PM


BP plc (BP: View sentiment for BPsentiment, chart, options) attracted heavy put volume on Monday, with activity ramping up to 1.76 times the usual level. During the course of the session, traders on the International Securities Exchange (ISE) bought to open 3,068 puts on the oil major, compared to just 569 calls. In other words, puts were 5.39 times more popular than calls yesterday.

BP SOIRIn fact, speculators on the ISE have rarely shown a greater appetite for put options on BP. The security's 10-day ISE put/call volume ratio weighs in at 1.75, in the 97th annual percentile. This elevated reading indicates that traders on this exchange have purchased bearish bets over bullish at a faster pace only 3% of the time during the previous year.

Likewise, BP's Schaeffer's put/call open interest ratio (SOIR) is also pointing to heavy pessimism. The stock's SOIR arrived today at 0.80, which ranks higher than 81% of other such readings taken during the past 52 weeks. In other words, short-term option players have been more skeptically aligned toward the shares just 19% of the time.

In the front-month series of options, the 55 strike is home to peak call and put open interest. The October 55 call has 19,248 contracts outstanding, while the October 55 put has 5,490 contracts in residence. BP is currently trading near $53.60, which means that traders are favoring out-of-the-money calls and in-the-money puts.

BP open interestAlthough there's a predominant bearish bias among near-term option traders, that glut of overhead call open interest could cause trouble during the coming weeks. As expiration draws closer, BP could encounter options-related resistance at the 55 strike.

As it so happens, at least one trader is expecting stagnation from BP during the short term. Taking a closer look at Monday's option volume, there appears to be a short strangle buried among the heavy put activity.

Specifically, three blocks totaling 2,019 contracts traded on both BP's November 55 call and November 50 put shortly after the open on Monday. These symmetrical blocks were marked "spread," and most of them traded between the bid and ask prices -- but a few traded closer to the bid price, suggesting that these calls and puts were sold.

This theory is supported by the fact that BP was trading squarely between the two strikes when the position was initiated. In a short strangle, the trader is looking for the underlying stock to remain pinned between the sold put and call strikes through expiration. Both options will then expire worthless, allowing the speculator to retain the initial premium received as his or her maximum profit.

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