U.S. stocks tumbled again Thursday as investors continued to fret about the possibility of rising inflation and higher interest rates. For the second time in four days, the Dow Jones industrial average sank more than 1,000 points, or 4.2 percent, to end Thursday day at 23,860. The Standard and Poor's Index, the benchmark for many index funds, also shed 100.66 points, or 3.8 percent, to close at 2,581. It last hit that low in mid-November. The two indexes have dropped 10 percent from their all-time highs, set on January 26. That means they are in what is known on Wall Street as a "correction," fueled by fears that a long stretch of low interest rates and tame inflation, which helped driven up stock prices, might be coming to an end. As…