The S&P 500 eked out another record close on Wednesday as easing oil prices offset weakness in parts of the semiconductor trade, but Polymarket traders are leaning slightly bearish ahead of a crucial inflation reading due Thursday. The S&P 500 rose 0.02% to close at a fresh record of 7,520.36. The May 28 Polymarket contract implied a 55% probability that the benchmark index would open lower on Thursday, compared with a 45% chance of an upward op…