Following IBM's Q2 results, Collins Stewart touts the company's booming mainframe business, and...

|By:, SA News Editor

Following IBM's Q2 results, Collins Stewart touts the company's booming mainframe business, and expects software sales to remain strong; and Citi notes how growth is strong in both North America and emerging markets. However, Gleacher & Co. questions "how much operating leverage remains in the company's financial model." Shares +5.2%.