Carry-to-Risk Ratio

Is the yield worth the risk?

A carry trade borrows in a low-interest currency to invest in a higher-yielding one, pocketing the rate difference. But the borrowed currency can move against you and wipe out the gain. The carry-to-risk ratio turns that trade-off into a single number: it divides the interest-rate differential (the "carry") by the expected volatility of the currency pair (the "risk"), much like a Sharpe ratio for currencies.

A high ratio means the rate advantage is large relative to how much the exchange rate is likely to swing — an attractive setup. A low ratio means you are taking on a lot of volatility for a thin yield pick-up, and a single sharp move could erase months of carry.

The rupee maths in 2026

For years the rupee offered a generous positive carry, with Indian rates sitting well above US rates. That gap has narrowed. After the RBI eased the repo rate to 5.25% while the US Federal Reserve cut its policy rate into the 3.75-4.00% range, the differential compressed toward roughly 2.0-2.5%. A smaller carry, all else equal, pulls the ratio down.

At the same time, the "risk" side has worsened. Through 2026 the rupee depreciated sharply — moving from the mid-80s toward the ₹95 area against the dollar amid FPI outflows, costly oil imports and West Asia tensions — and realised volatility climbed. A narrower carry divided by higher volatility makes the rupee a far less compelling carry currency than it once appeared.

Why traders watch it

The ratio is essentially a screening tool. Two currencies might offer the same headline yield, but the one with calmer, RBI-managed volatility delivers a better risk-adjusted carry. Conversely, when central-bank intervention can no longer suppress swings — as when the RBI capped banks' dollar positions during stress — the volatility input spikes and the trade's appeal collapses.

For an Indian institution or NRI weighing rupee-versus-dollar positions, the carry-to-risk ratio is a reminder that an enticing interest rate means little if the currency it is denominated in can lurch several percent in a week. Carry pays you to wait; volatility is what can hurt you while you do.