It's not often that the Federal Reserve eases monetary policy with the stock market this strong. But when it does, it's like throwing gasoline on a fire. The Fed is widely expected to lower its overnight rate by a quarter percentage point on Wednesday. That would take place with the S & P 500 at record levels. The benchmark closed at 6,890.89 on Tuesday and briefly traded above 6,900 for the first time. JPMorgan's trading desk counts only four other instances in which rates were lowered with the S & P 500 at an all-time high. One year out, the benchmark was higher each time with an average return of 20%, according to JPMorgan. The worst return was 15%. .SPX YTD mountain SPX year to date "That alone should be enough to get the market fully bulled up," JPMorgan traders said. The cases are ra

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