Longer-term bonds sold off on Tuesday as fears about stronger economic growth pressured demand for safer investments.

The 30-year yield briefly touched 4.942%. If it closes at that level, it’ll be the highest since Jan. 14, when yields closed at 4.983%.

Higher yields create opportunities for investors to step in and buy, but given yields move inversely to bond prices, it also means lower prices for the trillions of dollars in government bonds held by investors.