Salesforce, Inc.

(NYSE:CRM) shares are trading lower Tuesday in sympathy with International Business Machines Corp (NYSE:IBM), which posted disappointing preliminary second-quarter earnings.

Salesforce stock is showing notable weakness.

What's pressuring CRM stock?

IBM's Preliminary Results Drive Software Slide IBM reported preliminary second-quarter revenue of $17.2 billion, up 1% year-over-year, but below the $17.86 billion consensus estimate, with CEO Arvind Krishna calling the results "disappointing" in a letter to investors.