U.S. Silica Holdings (NYSE: SLCA) and Liberty Oilfield Services (NYSE: LBRT) both rose 13%, while NOV (NYSE: NOV) was higher by nearly 10%. The stock market finished lower on Wednesday afternoon, losing ground late in the session to send all three major benchmarks down. News from the Federal Reserve showed a continued willingness to keep interest rates at rock-bottom levels, but investors weren't entirely comfortable with the central bank taking note of the recent rise in inflationary pressures.