Why investors run to safety, and where they go
When something frightens markets, a war, a crash, a bank failure, investors sell what could lose a lot and buy what they expect to hold its value. That one move pushes share prices down, government bond yields down and a few currencies up, all at once. This page explains why, which assets count as safe, and when the pattern breaks.
The terms you need
Each definition is followed by a real example from the latest data.
- Safe haven
- An asset investors buy when they are worried, because they expect it to hold its value: usually US Treasuries, German Bunds, gold, the US dollar, the Swiss franc and sometimes the yen. Heavy buying pushes bond prices up and yields down.
- Risk-off
- Market shorthand for days when investors cut risk: they sell shares and other risky assets and buy safe ones. The opposite, when they buy risk again, is called risk-on.
- VIX (volatility index)
- A measure of how much investors expect the US stock market to swing over the next month, worked out from options prices. Often called the fear gauge: it is usually between 12 and 20, and jumps in a panic.
- Carry trade
- Borrowing in a currency with low interest rates to invest in one with higher rates, and pocketing the difference. It pays while exchange rates are calm, and can unwind violently when they move.
- Bond yield
- The annual return a buyer earns by purchasing a bond at today’s price and holding it to maturity. When a bond’s price falls, its yield rises. The 10-year yield is the benchmark for mortgages and long-term business loans.
- Exchange rate
- The price of one currency in terms of another. When a currency weakens, imports cost more and exports become cheaper for foreign buyers.
From fear to falling yields
A flight to safety moves many markets in the same few hours, because the same investors are selling one thing to buy another.
- 1 →A shockSomething raises the chance of big losses: a war, a sharp fall in a popular sector, a bank in trouble, a surprise from a central bank.
- 2 →Risky assets are soldInvestors cut shares, lower-rated company bonds and emerging-market assets. Funds that borrowed to invest are forced to sell, which deepens the fall.
- 3 →Safe assets are boughtThe money goes into US Treasuries, German Bunds, gold, and the dollar, Swiss franc and yen.
- 4 →Prices adjustBuying lifts bond prices, so their yields fall. Safe-haven currencies strengthen. Measures of expected volatility, such as the VIX, jump.
- 5The economy feels itFalling shares make households and firms more cautious, and markets expect slower growth and lower interest rates. If the fear lasts, central banks may cut rates or lend to calm markets.
The market must be deep enough to sell billions in minutes without moving the price much. The US Treasury market is the deepest in the world, which is why it is the first stop in a panic.
Banks and companies outside the US owe trillions in dollars. In a panic they need dollars to repay, so they buy them. In 2008 and again in 2011, when the US was downgraded, the dollar and Treasuries still rose.
Bonds protect against bad news about growth, not about inflation. In 2022, as inflation surged, US shares fell about 19% and Treasuries lost about 12%. In March 2020, investors even sold Treasuries to raise cash, until the Fed stepped in.
Investors had borrowed cheaply in yen to buy higher-yielding assets. When Japan raised rates and US data weakened, they rushed to repay: the yen jumped from about 162 to about 142 per dollar in a month, Japanese shares fell 12% in a single day, and the VIX briefly spiked above 60.
Safe-haven buying pushed the franc so high that it threatened Swiss exporters. The Swiss National Bank capped it at 1.20 per euro in 2011, printing francs to defend the cap. When it gave up in January 2015, the franc jumped by about 30% within minutes.
October’s jitters
What stands out today
- Two sell-offs in technology shares, on 15 and 22 October, sent investors into Treasuries. The US 10-year yield fell by about a third of a point from its late-September level.
- The Swiss franc firmed against the dollar in October. The yen did not: Japan’s oil bill keeps it weak, even on days of fear.
Why it matters
Markets are caught between two fears. Oil above $110 is an inflation worry, which pushes yields up. A tech sell-off is a growth worry, which pushes them down. Which one dominates decides whether bonds protect investors this time, as they did on 22 October, or fall with shares, as in 2022.
This mechanic in the news
Recent stories that show this mechanism at work, newest first.
Sources and notes
- VIX: Cboe Volatility Index, daily close (via FRED). Charts show month-end values.
- US 10-year yield: US Treasury (via FRED). Swiss franc and yen: Federal Reserve noon buying rates (via FRED), which run about a week behind the market.
- History: 2022 returns, S&P 500 and the Bloomberg US Treasury index; August 2024, Bank of Japan and Tokyo Stock Exchange data; Swiss franc cap, Swiss National Bank announcements of 6 September 2011 and 15 January 2015.