Borrowing in a low-rate currency to buy higher-yielding assets, which unwinds violently in a panic. Finviro's term: “Carry Trade”.
What these trades are
A carry trade (Carry Trade) borrows where money is cheap and invests where it pays more, collecting the difference while markets stay calm: borrowing in a currency with near-zero interest and buying assets in a high-yield currency, or any structure built on the same idea.
Why it matters to a US stock trader
Because its huge pools of capital prop up global risk appetite: in its boom years it pushes liquidity into risk assets across the board. When its foundation turns (a rate hike in the cheap currency or a volatility jump), trades reverse together, with risk assets sold to repay loans. The contagion then reaches indexes with no direct link to either currency.
Its reversal signature
A sudden rise in the funding currency, a simultaneous drop in risk assets worldwide and a jump in volatility: a classic trio that repeated in the big reversal episodes. Knowing it in advance explains days with "no obvious reason" on the stock screen.
Hypothetical example
Years of borrowing in a currency yielding 0.1% to fund assets paying 5%. If the funding rate rises to 1% and the currency gains 8%, repayment gets costlier and the leverage loses money. Liquidations pile up and even assets unrelated to the story fall.
Common mistake
Ignore the funding of your own portfolio: buying on margin is a miniature carry trade. It is cheap when policy is easy, and its cost and the harshness of margin calls turn against you when policy tightens.
Its fragile condition
It pays while exchange rates and interest rates stay stable. It becomes a double-loss machine when the borrowing currency suddenly rises: the asset falls and the debt swells. When many unwind at once, it hits global assets together with "no local cause".
Where to see it on the platform
The macro dashboards track rates, the dollar and risk appetite: the triangle these trades live and die on.
The macro dashboard tracks interest-rate differentials and currencies within its cross-market risk indicators.