Salesforce.com Inc CRM.N dropped 5.5% as the online software company forecast full-year profit below market expectations. By Gertrude Chavez-Dreyfuss NEW YORK Feb 26 (Reuters) - The tech-heavy Nasdaq index partly rebounded on Friday from its worst day in four months in choppy trading, even as sentiment remained fragile, with fears of a rise in inflation keeping U.S. bond yields near a one-year high. "I think interest rate pressures have abated...so we're seeing a little bit of wind in the sails of some of these tech companies which may have been oversold," said Sal Bruno, chief investment officer at IndexIQ.