Brian Chappatta, Columnist

Treasury Rally Was a Flash, Not a Crash

Emerging-market turmoil naturally pushed traders to safety.

Startling but not perilous.

Photographer: Timothy A. Clary/AFP/Getty Images

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In an instant, everything seemed to change on Thursday in the $14.9 trillion Treasury market.

The benchmark 10-year yield, which was flirting with 3 percent yet again, at 1:34 p.m. suddenly plunged four basis points in one minute to 2.88 percent. Two-year yields fell about the same amount. Ten-minute volume in 10-year Treasury futures soared, exceeding that of the period following Friday’s jobs report. Screens flashed: “What’s going on?” “Can’t get to the bottom of it.” On Twitter, users pondered whether a fat-finger trade was to blame.