By Lewis Krauskopf, Devik Jain and Sruthi Shankar (Reuters) – Wall Street’s main indexes posted solid gains on Thursday, fueled by strong performance from defensive and tech shares that outweighed declines for economically sensitive groups as worries persisted about a potential recession. The benchmark S&P 500 swung between positive and negative during the session, but stocks picked up steam heading into the market’s close. Benchmark U.S. Treasury yields fell to two-week lows, supporting tech and other rate-sensitive growth stocks. Trading has remained volatile in the wake of the S&P 500 last …