May 25 (Reuters) - Wall Street’s main indexes opened higher on Tuesday, buoyed by gains in technology-related mega caps as inflation worries ebbed and U.S. bond yields eased for the fourth straight day. The Dow Jones Industrial Average rose 34.7 points, or 0.10%, at the open to 34428.66. The S&P 500 rose 8.9 points, or 0.21%, at the open to 4205.94, while the Nasdaq Composite rose 60.4 points, or 0.44%, to 13721.543 at the opening bell. (Reporting by Shashank Nayar in Bengaluru; Editing by Maju Samuel) Our Standards: The Thomson Reuters Trust Principles.