RESEARCH TRIANGLE PARK – CNBC’s Jim Cramer of “Mad Money” fame says be careful when considering investing in IBM stock even after Big Blue’s Street-beating quarter and an increase in financial guidance.

“Even after IBM’s nearly 5% rally today, the stock’s still down substantially versus where it was trading just a few months ago. I’m optimistic … but keep in mind this remains a ‘trust but verify’ situation going forward,” he said on CNBC.

Plus, watch this video analysis of IBM:

IBM’s CEO praises Red Hat as cloud, other revenues surge 18%