The Federal Reserve is probably one of the institutions' most closely
monitored by investors. This indicates that investors believe the acti
ons of the Fed have implications for asset prices. To this date, the t
rading activities of the Fed in the financial markets have not been ex
amined to see how the Fed influences asset prices. Using daily data on
open market operations (OMOs) and asset prices, this study fills this
void. One finding of the paper is that OMOs Granger-cause both short-
and long-term interest rates. Furthermore, the sign of the relationsh
ip confirms the existence of the liquidity effect. Given that its trad
es represent a small portion of the market volume, how the Fed influen
ces bond prices is a puzzle. The only reasonable explanation is that t
he Fed's trades have high information content. Judging by the impulse
response paths, the reaction of interest rates to open market operatio
ns is fast. Additionally, it appears that monetary policy has a lastin
g impact on interest rates.