By Tatyana Shumsky 

After making some wild swings in response to stronger U.S. economic growth and employment data, gold prices moved lower Wednesday amid investor caution ahead of the Federal Reserve monetary policy statement.

Gold for December delivery, the most actively traded contract, was recently trading down $2.40, or 0.2%, at $1,298.10 a troy ounce on the Comex division of the New York Mercantile Exchange.

Gold prices fell to a session low of $1,293.20 an ounce after data showed the U.S. economy expanded at a seasonally adjusted annualized rate of 4% in the second quarter. This beat economists' forecast of 3% growth for the period.

The upbeat reading was bad news for gold bugs, as stronger growth paves the way for the Fed to wind down its stimulus efforts and begin raising interest rates. Gold has no yield and is likely to struggle when interest rates are higher because other haven assets, like Treasury bonds, can offer better returns.

"We could see more aggressive Fed action with interest rates," said Bob Haberkorn, a senior commodities broker with RJO Futures in Chicago.

Private-sector jobs rose by 218,000 from June to July, according to an employment report released Wednesday morning by Moody's Analytics and payrolls processor Automatic Data Processing Inc.

But the data also fueled inflationary fears, which prompted some investors to pile back into gold, helping lift futures to a session high of $1,305.20 an ounce.

"It's more people working, more people spending," said George Gero, senior vice president with RBC Capital Markets Global Futures.

Some market watchers have worried that the central bank isn't paying enough heed to inflation, and that policy efforts will lag flyaway prices. Gold is considered by some traders as a hedge against inflation because the precious metal tends to keep its value better than other assets.

In midmorning trade, gold had resumed its slide ahead of the Federal Open Market Committee monetary policy statement, due out at 2 p.m. EDT.

Write to Tatyana Shumsky at tatyana.shumsky@wsj.com