What it means
Conventional monetary policy works by moving a short-term policy rate. When that rate is already at or near zero, the central bank cannot cut much further, so it turns to the quantity of money instead of its price.
QE is that second lever: buying bonds on a large scale to influence longer-term rates directly. The mechanism runs through prices and portfolios.
Heavy central bank buying raises bond prices, and because bond prices and yields move in opposite directions, yields fall; the sellers of those bonds then hold cash they typically redeploy into corporate bonds, equities or lending. Cheaper long-term money is meant to encourage borrowing, investment and hiring.
For a business, the effects show up in financing conditions rather than in any announcement. Loan and bond pricing is usually referenced to government yields, so a fall in those yields feeds into what a company pays on new debt, and asset prices including property and equity valuations tend to rise.
Refinancing windows open and appetite for riskier lending increases. The criticisms are worth understanding.
QE inflates asset prices, which mainly benefits people who already own assets, and it can encourage borrowing that only makes sense while money stays cheap. It is also easier to start than to stop, because withdrawing support tends to unsettle markets that have grown used to it.
QE is not the same as the government printing money to fund its own spending, though the two are frequently confused. The central bank buys existing bonds in the secondary market and holds them as assets against the reserves it created, and the operation is intended to be reversed later through quantitative tightening.
Whether it proves inflationary depends on whether those new reserves actually turn into lending and spending.
In practice
Real-world examples.
Example
A property developer with a $120 million construction facility due for refinancing finds that ten-year government yields have fallen by nearly a full percentage point during a purchase programme. The refinancing completes at a rate more than 80 basis points below the old facility, cutting annual interest by close to $1 million.
Example
A pension fund that sold government bonds into the central bank's buying finds itself holding cash it must redeploy to meet its return target. It shifts into investment grade corporate bonds and infrastructure debt, which is exactly the portfolio rebalancing the policy is designed to produce.
Example
A mid-sized manufacturer decides to bring forward a factory automation project by two years because ten-year fixed borrowing has become unusually cheap. The finance director locks the rate for the full term rather than borrowing floating, on the view that the cheap conditions will not last.
Think of it
“QE is the abbreviation for quantitative easing-central bank asset buying.
Formula
Calculation
Balance sheet expansion = monthly purchase pace x number of months. Interest saving for a borrower = principal x fall in yield.
A central bank announces asset purchases of $80 billion a month for 12 months. The expansion is $80 billion x 12 = $960 billion. If the balance sheet started at $4.2 trillion, it ends the programme at $4.2 trillion + $0.96 trillion = $5.16 trillion.
Now trace the effect on one company. Suppose the buying helps push the 10-year government yield down from 3.0% to 2.4%, a fall of 0.6 percentage points, or 60 basis points. A firm refinancing $50 million of ten-year debt at a fixed spread over that yield saves 0.006 x $50,000,000 = $300,000 a year, which is $3,000,000 across the life of the debt.Case study
Seen in the real world.
This is an illustrative, fictional case. Brantfield Components, an invented industrial group, had a $180 million bank facility maturing in three years and a long-standing plan to replace two ageing plants. Historically it had borrowed floating and refinanced every three to five years.
During an extended central bank purchase programme, the group's treasurer noticed that ten-year fixed funding had fallen to within 40 basis points of the floating rate the company was already paying. Brantfield issued $200 million of ten-year fixed notes early, well before the existing facility matured, and used the proceeds to repay the facility and fund the first plant.
In the fictional years that followed, yields rose sharply as the programme was reversed, and competitors refinancing later paid materially more. The illustrative point is that QE changes the price and the availability of long-term money, and the businesses that benefit most are those that act while the window is open rather than waiting for their existing debt to mature.
Watch out
Common mistakes.
- Describing QE as the government printing money to pay its bills, when the central bank buys existing bonds in the market and records them as assets against the reserves created.
- Assuming QE automatically causes consumer price inflation, when the effect depends on whether the new reserves turn into lending and spending rather than sitting idle.
- Watching only the policy interest rate during a QE period, and missing that the action is happening in long-term yields and asset prices instead.
Questions
People also ask.
Why do central banks use QE instead of just cutting rates?
Because once the policy rate is already near zero there is little room left to cut, so the central bank acts on the quantity of money and on longer-term yields instead.
Does QE help ordinary businesses or only financial markets?
It reaches businesses through cheaper and more available credit, though the benefit is uneven and lands first with borrowers and asset owners.
How is QE ever undone?
Through quantitative tightening, where maturing bonds are not reinvested or holdings are sold, which gradually shrinks the balance sheet again.
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