Inflation was flat in October from the prior month, core CPI hits two-year low

Inflation was flat in October from the previous month, providing a hopeful sign that stubbornly high prices are easing their grip on the U.S. economy and giving a potential green light to the Federal Reserve to stop raising interest rates.

The consumer price index, which measures a broad basket of commonly used goods and services, increased 3.2% from a year ago despite being unchanged for the month, according to seasonally adjusted numbers from the Labor Department on Tuesday. Economists surveyed by Dow Jones had been looking for respective readings of 0.1% and 3.3%.

Headline CPI had increased 0.4% in September.

Excluding volatile food and energy prices, core CPI increased 0.2% and 4%, against the forecast of 0.3% and 4.1%. The annual level was the lowest in two years, down from 4.1% in September, though still well above the Federal Reserve’s 2% target.

Markets spiked following the news. The Dow Jones Industrial Average roared higher by nearly 500 points as Treasury yields fell sharply. Traders also took any potential Fed rate hikes almost completely off the table, according to CME Group data.