A higher IOER rate encourages banks to raise the interest rates they charge, putting upward pressure on market interest rates regardless of the level of reserves in the banking sector. While adjusting the IOER rate is an effective way to move market interest rates when reserves are plentiful, federal funds have generally traded below this rate.
I will say this: the central banks can actually support growth beyond a point. When there is no inflation, they can cut interest rates, and that is the way they support growth, but if you cut interest rate to the bone, there is nothing more to cut. It is very hard to support growth beyond that.
The reality is that business and investment spending are the true leading indicators of the economy and the stock market. If you want to know where the stock market is headed, forget about consumer spending and retail sales figures. Look to business spending, price inflation, interest rates, and productivity gains.