DoubleLine Capital CEO Jeffrey Gundlach said the Treasury market is signaling that the Federal Reserve will need to do more than talk tough if policymakers are serious about reaching their 2% inflation target.

“If you really want to get to 2%, I think you have to raise interest rates,” Gundlach said on CNBC’s “Closing Bell” Wednesday after the Fed’s latest policy decision. “I think getting 2% is going to take a long time. We might not get there over the course of the next couple of years.”

The Fed left its benchmark interest rate unchanged at a range of 3.5% to 3.75%, a decision that was widely expected. The move was not approved unanimously, however, with three policy members dissenting in favor of raising rates by a quarter percentage point.

Gundlach said the divergent moves across the Treasury curve following the announcement showed investors’ skepticism that the Fed will ultimately follow through.

“The two-year Treasury rallied today because it thinks the Fed is taking its time,” he said. “And the long bond yield went up significantly after the press conference, because the bond market vigilantes are saying, ‘If you really want us to believe your rhetoric, you’ve got to start acting.'”

The benchmark 10-year Treasury yield rose more than 7 basis points to 4.681%, while the 30-year bond yield surged to 5.213% for its highest level since 2007. Meanwhile, the policy-sensitive two-year Treasury yield fell 3 basis points to 4.244%.

The long end is generally tied to expectations for inflation and deficits, while the short end is closely related to interest-rate expectations in the shorter run.

Fed Chairman Kevin Warsh stressed that the Fed will take necessary steps to meet its 2% inflation goal.

“I understand the desire for rolling forecasts and commentary from this committee, but for our part, we need to observe market reaction to developments direct and unfiltered,” Warsh said. “I want to stress, of course, that decisions by this committee matter a great deal, and where necessary and appropriate, we will not hesitate to act.”