Wall Street closely watches Federal Reserve meetings, but it's not just the decision on interest rates that makes headlines. The central bank's dot plot is a key quarterly forecast for both investors and economists.

The U.S. central bank is widely expected to cut interest rates for the first time this year, despite the economy sending mixed signals.

The Federal Reserve is expected to cut its benchmark interest rate by a quarter of a point when it meets on Wednesday, the first cut in about a year. It has been described by those who watch the Fed as the most unprecedented meeting in many years due to political pressure from President Trump.

The Federal Reserve's two-day policy-setting meeting begins Tuesday. Policy committee members may be divided on their decision and forecasts.