The bond-market rally is defying the typical investing playbook. Here’s why.

The U.S. economy expanded at its fastest pace in more than five years in the third quarter, according to the Commerce Department's initial GDP reading. Conventional thinking would suggest that robust growth might pressure bond prices, yet Treasury bonds staged a surprise rally in October despite a barrage of strong economic data.

That divergence is notable because it runs against the usual playbook, in which strong growth and bond rallies rarely coincide. The development suggests investors may be weighing factors beyond headline GDP — such as the durability of growth, inflation trends, or demand for safe assets — rather than reacting mechanically to strong data.

For observers, the key question is whether October's bond rally reflects a temporary repositioning or a broader shift in how markets interpret economic strength. Watching incoming data, inflation readings, and Federal Reserve communications will help clarify whether growth and bond performance can continue to move in the same direction — an unusual pairing worth monitoring.