If the core CPI month-on-month increase is greater than 0.4%, the S&P 500 index may drop by 1.5%;

If the increase is between 0.35% and 0.4%, the S&P index may drop by 0.8%;

If the increase is between 0.31% and 0.34%, the S&P index will fluctuate slightly;

If the increase is between 0.25% and 0.3%, the S&P index will rise by 0.8%;

If the increase is less than 0.25%, the S&P index may rise by more than 1.2%