Prepare to have your minds blown courtesy of what is easily the most astounding chart we have seen in a long, long time, prepared by the economists at the, drumroll, New York Fed, which finds that absent what the Fed calls "Pre-FOMC Announcement Drift", or the move in the S&P in the 24 hours preceding FOMC announcements, the S&P 500 would be at or below 600 points, compared to its current level over 1300. The reason for the divergence: the combined impact of cumulative returns of in the S&P on days before, of, and after FOMC announcements. But, but, fundamental, technical, coffee grinds, Finance 101, Oprah Winfrey, Jim Cramer and Econ 101 analysis (in declining order of relevance and increasing order of voodoo) all tell us this is im-po-ssible? Because if the Fed is right about the Fed induced drift, it is all about, you guessed it, easy money.

Here it is, black pixels on white LCD, straight from Simon "Harry" Potter henchmen's mouth:

We show that since 1994, more than 80 percent of the equity premium on U.S. stocks has been earned over the twenty-four hours preceding scheduled Federal Open Market Committee (FOMC) announcements (which occur only eight times a year)—a phenomenon we call the pre-FOMC announcement “drift.”

We are fairly certain one can come up with many other names for this "phenomenon." It goes on:

Our findings suggest that the pre-FOMC announcement drift may be key to understanding the equity premium puzzle since 1994. However, at this point, the drift remains a puzzle.

Not a puzzle. Just go into sub-basement C and keep staring at the Heidelberg Mainstream 80, Web-fed Rotary Printer until the puzzle solves itself.

Full paper:

The Puzzling Pre-FOMC Announcement “Drift”





For many years, economists have struggled to explain the “equity premium puzzle”—the fact that the average return on stocks is larger than what would be expected to compensate for their riskiness. In this post, which draws on our recent New York Fed



David Lucca and Emanuel Moench For many years, economists have struggled to explain the “equity premium puzzle”—the fact that the average return on stocks is larger than what would be expected to compensate for their riskiness. In this post, which draws on our recent New York Fed staff report , we deepen the puzzle further. We show that since 1994, more than 80 percent of the equity premium on U.S. stocks has been earned over the twenty-four hours preceding scheduled Federal Open Market Committee (FOMC) announcements (which occur only eight times a year)—a phenomenon we call the pre-FOMC announcement “drift.”

The equity premium is usually measured as the difference between the average return on the stock market and the yield on short-term government bonds. Previous research on the size of the premium finds that it is too large for plausible levels of risk aversion (see Mehra [2008] for a review).





The Drift: A First Take



The pre-FOMC announcement drift is best summarized in the chart below, which provides two main takeaways:

Since 1994, there has been a large and statistically significant excess return on equities on days of scheduled FOMC announcements.

This return is earned ahead of the announcement, so it is not related to the immediate realization of monetary policy actions.











The chart shows average cumulative returns on the S&P 500 stock market index over different three-day windows. The solid black line displays the average cumulative return starting at the market’s opening on the day before each scheduled FOMC announcement to the market’s close on the day after each announcement. Our sample period starts in 1994, when the Federal Reserve began announcing its target for the federal funds rate regularly at around 2:15 p.m., and ends in 2011. (For a list of announcement dates, see the FOMC calendars.) The shaded blue area displays the 95 percent confidence intervals around the average cumulative returns—a measure of statistical uncertainty around the average return. We see from the chart that equity valuations tend to rise in the afternoon of the day before FOMC announcements and rise even more sharply on the morning of FOMC announcement days. The vertical red line indicates 2:15 p.m. Eastern time (ET), which is when the FOMC statement is typically released. Following the announcement, equity prices may fluctuate widely, but on balance, they end the day at about their 2 p.m. level, 50 basis points higher than when the market opened on the day before the FOMC announcement.



How do these returns compare with returns on all other days over the sample period? The dashed black line, which represents the average cumulative return over all other three-day windows, shows that returns hover around zero. This implies that since 1994, returns are essentially flat if the three-day windows around scheduled FOMC announcement days are excluded.





A Deeper Look through Regression Analysis



The previous chart showed stock returns without accounting for dividends or the return on riskless alternative investments. In the table below, we account for these factors in a regression analysis by considering the return, including dividends (in percent), on the S&P 500 index in excess of the daily yield on a one-month Treasury bill rate, which is a measure of a risk-free rate. We regress this “excess return” on a constant and on a “dummy” variable, equal to 1 on days of FOMC announcements.











The coefficient on the constant (second row) measures the average return on non-FOMC days, while the coefficient on the FOMC dummy (top row) is the differential mean return on FOMC days. In the first column, we regress close-to-close stock returns and see that excess returns on FOMC days average about 33 basis points, compared with an average excess return of about 1 basis point on all other days. As seen in the previous chart, this return is essentially earned ahead of the announcement—hence our label of a pre-FOMC announcement drift. Indeed, in the third column we see a return of about 49 basis points during a