By Jud Pyle, CFA, chief investment strategist for the Options News NetworkOn Feb. 24, I wrote about some call-buying activity in Hewlett-Packard ( HPQ). At the time, the stock was trading for around $29. It since has slid to below $26 on March 9 before rallying to close on Friday at $28.85. The March 30 calls that were purchased for about $1.15 therefore expired out of the money. However, yesterday with the big rally in the market, HPQ shot back up to over $31. Today there was some interesting, longer-dated call-option volume to look at.