CNBC Stock Blog

Bulls See More Upside in Stryker

David Russell | Writer, OptionMonster
Insider ownership: 24.36% Shares owned: 94,613,680 Insider holdings value: $4.47 billion YTD share performance: -12.1% Market cap: Total shares outstanding:

Stryker pulled back after running hard in January, and now the bulls are looking for more upside.

OptionMONSTER's tracking systems showed the purchase of some 2,100 March 65 calls for $0.60. Volume was more than triple previous open interest at the strike.

Calls lock in the price where investors can buy shares, so they have the potential to generate significant leverage in the event of a rally. But these options also will become worthless if the stock doesn't move by the mid-March expiration.

Stryker shares rose 0.19 percent to $63.90 yesterday and is up 17 percent so far in 2013. The maker of replacement joints issued a strong preliminary earnings report on Jan. 9, then beat those estimates when final numbers were released two weeks later.

Total option volume was twice the daily average in the session, with calls outnumbering puts by a bullish 31-to-1 ratio.

—By CNBC Contributor David Russell

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David Russell is a reporter and writer for OptionMonster. Russell has no positions in SYK.