Pacific Investment Management Co.’s Bill Gross, manager of the world’s biggest bond fund, said in a Twitter posting that the Federal Reserve may hint in August of plans for additional monetary stimulus.

“Next Jackson Hole in August will likely hint at QE3/interest rate caps,” he wrote referring to the Fed’s annual symposium in Jackson Hole, Wyoming, in a 10:24 a.m. message.

The use of yield ceilings has precedent. The Fed maintained a limit of 2.5 percent on long-term Treasury bonds in the 1940s for almost a decade. In 2002, then Fed Governor Ben S. Bernanke, in a speech to the National Economics Club in Washington entitled, “Deflation: Making Sure ‘It’ Doesn’t Happen Here,” said he preferred the tool as a means of lowering long-term rates.

Bernanke said last year at the Fed gathering in Wyoming that “additional purchases of longer-term securities, should the FOMC choose to undertake them, would be effective in further easing financial conditions,” hinting of an upcoming second round of quantitative easing. The Fed began a program of $600 billion in Treasury purchases in November that ends this month.

Gross said during a June 3 interview on Bloomberg Radio that “we don’t see a QE3,” referring to the policy that’s become known as quantitative easing. He added that given the current pace of growth and inflation the Fed “will speak to a fed funds rate that persists for an extended period of time, which in effect caps interest rates in the process.”

Mark Porterfield, a spokesman for Newport Beach, California-based Pimco, didn’t immediately respond to telephone and e-mail requests for additional comment.

Pimco, a unit of the Munich-based insurer Allianz SE, managed $1.28 trillion of assets as of March 31.