Michael M. Santiago / Getty Images The Fed is set to make its latest interest-rate call Wednesday afternoon. Wall Street is pretty confident that stock market will get a boost from a rate cut on Wednesday. Traders expect the S&P 500 to move about 0.6% in either direction on today, according to options pricing data. That would be the S&P 500’s biggest post-Fed-Meeting move since March, when the benchmark index finished up 1.1% after policymakers left their full-year interest rate forecasts despite increasi ...