NEW YORK (AP) — U.S. stocks are rallying Wednesday and are on track for their first gain in six days. But more turbulence may be ahead when the Federal Reserve announces in the afternoon how sharply it’s raising interest rates. The S&P 500 was 0.9% higher. Most investors expect the Fed to raise rates by triple the usual amount, the sharpest hike since 1994. Investments around the world have tumbled this year as high inflation forces central banks to swiftly remove supports propped underneath markets in the pandemic. Treasury yields eased from their highest levels in a decade following disappointing reports on the economy.