NEW YORK — U.S. stocks are drifting Wednesday as the countdown ticks toward this afternoon’s announcement from the Federal Reserve on what it will do with interest rates. The S&P 500 rose 0.2 percent and pulled within 1 percent of its all-time high, which was set earlier this month. The Dow Jones Industrial Average was up 149 points, or 0.3 percent, as of 12:46 p.m. Eastern time, and the Nasdaq composite was mostly unchanged. The day’s highlight will likely be what the Federal Reserve says, if anything, about where interest rates are heading. The Fed raised its main interest rate last month for the first time in three years in hopes of slowing the high inflation that’s squeezing the economy and discouraging Americans. The widespread expectation on Wall Street is that the Fed will leave the federal funds rate alone at this meeting, and the question is whether it will give hints about what may happen at later meetings. Fed Chairman Kevin Warsh, though, has been adamant since taking over the Fed about wanting it to give fewer indications about its future moves. Wall Street cares so