We construct a dataset for every U.S. Treasury auction from 2003 to 2012. We find that market factors known before the auction -- FedFunds rate, S&P, VIX -- are all significant for the auction high-yield, but the relationships differ before vs. during QE and between Bond and Bills auctions....

Since 2007, three actors have been particularly important in U.S. Treasury auctions: The U.S. government, issuing $8.4 trillion in U.S. Treasury securities in 2010 alone; foreign official entities, purchasing $398 billion in U.S. Treasury securities in 2010 alone; and finally the Federal Reserve,...