In an argument for quarter-point hikes, Bostic said he favored "slow and steady" as the appropriate course of action for the Fed, as the impact of higher interest rates may only start to be felt in the spring.

The yield on 10-year Treasury notes had earlier touched a fresh four-month high of 4.091% after data showed the number of Americans filing new unemployment claims fell again last week, indicating continued strength in the labor market, while a separate report showed U.S. labor costs grew faster than initially thought in the fourth quarter.

The two-year U.S. Treasury yield, had earlier touched a fresh 15-year high at 4.91%.

"Bostic has been a little bit more hawkish so the fact that he basically said 25 was comforting because he has been on the hawkish end of hawkish people," said Rhys Williams, chief strategist at Spouting Rock Asset Management in Bryn Mawr, Pennsylvania.

"The Fed is not crazy, they understand monetary policy works with a lag, so you are just starting to see now the impact of the first rate hikes, let alone the other 400 basis points they did."

According to preliminary data, the S&P 500 gained 29.90 points, or 0.76%, to end at 3,981.29 points, while the Nasdaq Composite gained 83.43 points, or 0.73%, to 11,462.92. The Dow Jones Industrial Average rose 346.57 points, or 1.06%, to 33,008.41.

Fed funds futures tied to the Fed's policy rate see about an even chance that the rate will get to a range of 5.5%-5.75% by September, from the current range of 4.5%-4.75%.

Monthly payrolls and consumer prices data in the coming days will offer investors more clues on how aggressive the central bank may be heading into the Fed's March 21-22 meeting, where it is currently expected to raise rates by 25 basis points.

The S&P 500 was trading just above its 200-day moving average, seen as a key support level by traders, after briefly falling below it for the first time since Jan. 25 earlier in the session.

Salesforce Inc soared, after the cloud-based software firm forecast first-quarter revenue above analysts' estimates and doubled its share buyback to $20 billion.

Tesla Inc fell after Chief Executive Elon Musk and team's four-hour presentation failed to impress investors with few details on its plan to unveil an affordable electric vehicle.

Macy's Inc jumped after the department store operator forecast full-year profit above Wall Street estimates,

Silvergate Capital plunged after the crypto-focused lender delayed its annual report and said it was evaluating its ability to operate as a going concern.