Your Social Security check could go up another $71 next year. That’s not necessarily good news.

A larger Social Security cost-of-living adjustment (COLA) may look like a raise, but it is really a mirror held up to inflation. If next year's COLA adds roughly $71 to the average monthly check, that figure reflects how much prices have climbed over the past year — not an improvement in retirees' purchasing power. The adjustment is designed to keep benefits level in real terms, so a bigger number generally means the underlying inflation it is meant to offset was larger too.

That distinction matters for markets. A persistently elevated COLA suggests inflation is proving sticky rather than fading quickly, which can influence expectations around interest rates and, in turn, bond yields and equity valuations. It also has fiscal implications: each incremental increase in benefits adds to long-term program costs, keeping the debate over Social Security's funding outlook in the foreground.

For observers, the key is to separate the headline dollar figure from what it signals. Watch the inflation data that feed into the COLA calculation, and how policymakers and markets respond to signs that price pressures are lingering.