By Chuck Mikolajczak NEW YORK (Reuters) – U.S. stocks closed lower for a second straight session on Tuesday after data indicating that the labor market remained on solid ground dimmed hopes the Federal Reserve might have enough reason to begin reducing the size of its interest rate hikes. A survey showed U.S. job openings unexpectedly rose in September, suggesting that demand for labor remains strong even as the central bank has embarked on a path of aggressive rate hikes in an effort to bring down stubbornly high inflation. Investors have been paying close attention to labor market data for a…