After policymakers announce their next interest rate move at the Federal Reserve meeting on Wednesday, the S&P 500 could see a lackluster gain.

Since the Federal Open Market Committee raised the key interest rate by 75 basis points on June 15, the S&P 500 has gained 3.5%.

The S&P 500's direction is different than it has been in the past.

The Fed days in which the S&P 500 has been down more than 5% between meetings have usually seen stronger gains on the Fed day itself whereas gains have been more subdued when it heads into a meeting in the green.

The S&P 500 has rallied in the past due to the actions of the Fed. The S&P has risen on three of the last four Fed days.

Since 1994, those have been the strongest market reactions to the Fed. The 3% rally in May was the fifth best Fed day on record and the 2.24% rally in March was the tenth best.

The moves to the upside in response to the FOMC have been a sight to behold.

The Fed rate hike is expected to be 75 basis points, according to the FedWatch tool. The Fed funds rate could be anywhere from 2% to 2.5%. A key recession indicator for the Fed has warned that traders want the central bank to ease off on rate hikes.