This paper shows that monetary policy decisions have a significant effect on investor sentiment. The effect of monetary news on sentiment depends on market conditions (bull versus bear market). We also find that monetary policy actions in bear market periods have a larger effect on stocks that are more sensitive to changes in investor sentiment and credit market conditions. Overall, the results show that investor sentiment plays a significant role in the effect of monetary policy on the stock market.

We examine whether monetary policy uncertainty influences the reaction of the equity, Treasury security, foreign exchange and crude oil markets, as well as medium-term interest rates, to U.S. macroeconomic announcements. Using intraday futures data, we show that in the presence of higher policy uncertainty the response to macroeconomic news weakens in the stock and crude oil markets and strengthens in the Treasury, interest rate and foreign exchange markets. In times of elevated monetary policy uncertainty, macroeconomic announcements impact the financial and crude oil markets to a large extent through expectations of future monetary policy.

This paper examines the information content of firm-specific sentiment extracted from Twitter messages. We find that Twitter sentiment predicts stock returns without subsequent reversals. This finding is consistent with the view that tweets provide information not already reflected in stock prices. We investigate possible sources of return predictability with Twitter sentiment. The results show that Twitter sentiment provides new information about analyst recommendations, analyst price targets and quarterly earnings. This information explains about one third of the predictive ability of Twitter sentiment for stock returns. Taken together, our findings shed new light on whether and why social media content has predictive value for stock returns.

This paper examines cyclical variation in the effect of Fed policy on the stock market. We find a much stronger response of stock returns to unexpected changes in the federal funds target rate in recession and in tight credit market conditions. Using firm-level data, we also show that firms that face financial constraints are more affected by monetary shocks in tight credit conditions than the relatively unconstrained firms. Overall, the results are consistent with the credit channel of monetary policy transmission.

We propose a novel identification approach based on a predictable change in the intraday volatility of index futures to estimate the Federal Reserve's reaction to stock returns. This identification approach relies on a weaker set of assumptions than required under identification through heteroskedasticity based on lower frequency data. Our approach also allows the examination of changes in the reaction of monetary policy to the stock market. We document an asymmetric response of policy expectations to changes in stock prices in adverse and positive economic environments. Specifically, the results show a sharp increase in the response of monetary policy expectations to stock returns during recessions and bear markets. This finding is consistent with the existence of the so-called “Fed put.”