Treasury Bills in the Fed's Portfolio

Think of it this way

Think of the Fed as someone filling a tank. Bills are replacing what evaporates so the level does not drop; long-term debt is opening the tap to raise it. From the outside both are water coming in, but only one is trying to change the level.

What is Treasury Bills in the Fed's Portfolio?

The balance of Treasury bills —debt maturing in less than a year— that the Federal Reserve holds on its balance sheet. It is published every Wednesday in the weekly H.4.1 report. On its own it says little; its value lies in comparing it with the total size of the portfolio, because the ratio of bills to long-term debt is what separates a maintenance purchase from a stimulus program.

How to read Treasury Bills in the Fed's Portfolio

It is read alongside the total size of the portfolio, not on its own. If the portfolio grows and all of that growth fits within bills, the Fed is replenishing reserves. If it grows more than bills do, the difference is in long maturities, and that is stimulus. Lag: none.

What Treasury Bills in the Fed's Portfolio means for the market

Indirect: what moves markets is not this figure but what it reveals about the Fed's intent. A central bank that buys only bills is keeping the machinery running; one that buys long-term debt is trying to make credit cheaper across the whole economy.

Where the money flows

The same path as any Fed purchase: it pays with money it creates and the bond moves onto its balance sheet. What changes with the maturity is where the effect is felt. By buying bills the effect stays in bank reserves; by buying long-term debt it also pushes down the rate at which mortgages and companies are financed.

What to watch in Treasury Bills in the Fed's Portfolio

Do not look at it on its own: its usefulness is as the denominator of the other. A rise in bills without a rise in the total means the Fed rotated from long to short maturities without creating new money.

How much of the Fed's portfolio is short-term bills.