Our banking system is based on fractional reserves. Banks take in deposits and make loans with
most—but not all—of the deposit money.
The portion that is not loaned out is called a reserve. There are both required reserves and excess
reserves, the former is what the Federal Reserve Bank mandates that banks hold
back and keep deposited in their accounts at the Fed. Excess reserves are the dollars which banks
are allowed to lend, but which they have chosen not to lend.
Under normal circumstances, banks have very little incentive to keep any
excess reserves—the Fed pays almost nothing in interest and they usually can
make a lot more money by lending. Only
if a bank has made loans which it anticipates will fail, or when it sees no
attractive lending opportunities, will it allow excess reserves to grow.
The ‘money supply’ (crudely, the number of dollars in our
financial system) grows faster or slower, depending mainly upon how much of
their reserves banks decide to lend.
Milton Friedman once famously said that “inflation is first and
everywhere a monetary phenomenon.” By
that Friedman meant that we get inflation when too many dollars are chasing too
few goods.
Stick with me—I’m building up to a relevant point. I promise.
For most of the history of the Federal Reserve Bank, total
reserves were comprised of ~95% required reserves and ~5% excess reserves. During periods of financial stress, or when
the Fed is said to be “easing”, the amount of total reserves has tended to go
up (and down again when the Fed “tightens”), but the ratio of required to
excess reserves has stayed remarkably constant.
For instance, Total Reserves in August 2001 stood at $39.98 billion,
went up to $57.96 billion in response to 9/11, but were back down to $39.51
billion by May 2002.
In August 2008, total reserves stood at
$46.59 billion and $44.72 billion of that, or 96%, was required. But then look what happens beginning in
September 2008: total reserves begin to sky rocket, while required reserves
increase much more slowly. Today, total
reserves are a whopping $1.66 trillion, or a 3,500% increase since August 2008.
With total reserves of $1.66 trillion, how much are the
required reserves? Only $98.08 billion,
or about 6% of the total. In other words, the ratio of required reserves to total
reserves has been turned completely upside down. “OK,” you say, “that rises to the level of
marginally interesting, but still—so what?”
Think back to the fractional reserve system of banking. Normally banks lend right up to the amount
they’re able to lend, but now they’re keeping 94% of their reserves in their
Fed accounts. This is the bank
equivalent of ‘mattress money.’
That reality has been frustrating to those at the Fed, who’ve
been hoping that banks will turn excess reserves into loans, thus stoking
economic growth. Instead all that money just sits there: 10% of
our annual GDP is parked at the Federal Reserve, doing nothing but collecting
0.25% interest. Why aren't the banks lending the excess reserves?
But here's the really big question: what will happen to the prices of the things we buy (recall Friedman's point above) if $1.5 trillion of excess reserves come rushing back into the economy by way of new loans?
But here's the really big question: what will happen to the prices of the things we buy (recall Friedman's point above) if $1.5 trillion of excess reserves come rushing back into the economy by way of new loans?