The results of Thursday's 30-year Treasury auction are out, Business Insider reports.

The highest yield at the auction was 3.355%, above the 3.324% "when-issued" level.

In other words, the auction "tailed," indicating weak demand.

(The "tail" is the difference between the highest yield on the Treasuries during the auction and the expected high yield when the auction first gets started – the "when-issued" level.)