Real Yields: Why Inflation Changes the Interest Rate Story
Posted: Sun Oct 04, 2026 8:11 am
Real Yields: Why Inflation Changes the Interest Rate Story
A nominal yield of 5 percent sounds attractive. If inflation is 6 percent, you are losing purchasing power. The real yield subtracts expected inflation from the nominal yield, and it often matters more for currencies than the headline rate.
Capital seeks the best return after inflation. A country with a 4 percent rate and 2 percent inflation offers a real yield of about 2 percent. Another with a 6 percent rate and 7 percent inflation offers negative 1 percent. Despite the higher nominal rate, investors may prefer the first.
That is why high-inflation countries often see weak currencies even when they raise rates sharply. Markets judge whether the rate increases are enough to keep up with prices.
One common measure uses inflation-protected government bonds. The yield on those bonds is itself a real yield, and changes in it can be compared across countries.
Real yields also help explain the behavior of assets like gold, which pays no interest. When real yields rise, holding gold becomes less attractive, and gold tends to weaken, often along with a stronger dollar.
The calculation is imperfect, since expected inflation is not directly observable, and different measures give different answers.
Still, thinking in real terms prevents a common mistake: assuming a high rate automatically supports a currency.
Practical step: calculate the approximate real policy rate, rate minus current inflation, for both countries in your pair, and compare.
A nominal yield of 5 percent sounds attractive. If inflation is 6 percent, you are losing purchasing power. The real yield subtracts expected inflation from the nominal yield, and it often matters more for currencies than the headline rate.
Capital seeks the best return after inflation. A country with a 4 percent rate and 2 percent inflation offers a real yield of about 2 percent. Another with a 6 percent rate and 7 percent inflation offers negative 1 percent. Despite the higher nominal rate, investors may prefer the first.
That is why high-inflation countries often see weak currencies even when they raise rates sharply. Markets judge whether the rate increases are enough to keep up with prices.
One common measure uses inflation-protected government bonds. The yield on those bonds is itself a real yield, and changes in it can be compared across countries.
Real yields also help explain the behavior of assets like gold, which pays no interest. When real yields rise, holding gold becomes less attractive, and gold tends to weaken, often along with a stronger dollar.
The calculation is imperfect, since expected inflation is not directly observable, and different measures give different answers.
Still, thinking in real terms prevents a common mistake: assuming a high rate automatically supports a currency.
Practical step: calculate the approximate real policy rate, rate minus current inflation, for both countries in your pair, and compare.