The PCE has potential to shake this market out of its stalemate. But I think the bulls could benefit from even a moderate reading tomorrow. Lower inflation is better for consumers, but the market itself may be set up for an inflow of cash if the Federal Reserve cuts rate by 0.5% in November. Investors have been taking advantage of the high yielding (+4% and higher) money markets that offer essentially no risk, like the G-fund. Cash will leave those money markets as theirs yields drop alongside the Fed Fund rate. Most of it will likely land in the stock market as investors seek to replace those higher yields.
With that in mind, it may take particularly lull inflation data from the PCE to scare off the bulls that have kept the market elevated since last Thursday's rally.
The market saw two significant pullbacks at the turn of the last two months. They loom over stockholders' heads as we take on the last few days of September. There are also bulls outside of the market and on the sidelines anticipating this pattern to continue. A rally tomorrow would take some reevaluation of their re-entry. Some will buy into a rally despite the higher prices.