U.S. stocks booked a dramatic turnaround on Tuesday, with the S&P 500 and Nasdaq Composite both ending a choppy session higher, even as investors kept an eye on signs that the U.S. could slip into a recession. The Dow Jones Industrial Average DJIA, -0.42% shed 0.4%, or about 130 points, to finish near 30,967. At the session’s low, the blue-chip index traded about 600 points lower, according to FactSet data. The S&P 500 index SPX, +0.16% eked out a gain of 0.2%, while the Nasdaq Composite Index COMP, +1.75% closed up 1.8%. A strong U.S. dollar DXY, +1.29% and tumbling oil prices also were in focus, with the U.S. benchmark CL00, -8.12% CLQ22, -8.12% falling 8.2% to close below $100 a barrel, its lowest in more than two months.