The Federal Reserve is lowering the minimum loan size for its middle-market business rescue program by more than half to make the program more available to smaller businesses. The central bank said Friday that small businesses seeking credit from the Main Street Lending Program can access loans as small as $100,000, down from the previous cutoff of $250,000, and that fees will be adjusted accordingly. The $600 billion program, which is funded by the Fed and the Treasury Department through the Coronavirus Aid, Relief and Economic Security Act, is available to businesses with fewer than 15,000 employees or less than $5 billion in annual revenue.