U.S. stocks rallied on Wednesday as investors were optimistic about possible trade deals between the United States and its key trading partners.

The Dow Jones Industrial Average increased 157.03 points, or 0.64 percent, to 24,527.27. The S&P 500 rose 14.29 points, or 0.54 percent, to 2,651.07. The Nasdaq Composite Index was up 66.48 points, or 0.95 percent, to 7,098.31.

Stocks of Caterpillar and Boeing, companies with high overseas revenue exposure, rose 1.73 percent and 1.45 percent, respectively, at the close, among the biggest winners in the Dow.

Eight of the 11 primary S&P 500 closed higher, with consumer discretionary and materials up 1.05 percent and 0.95 percent, respectively, leading the gainers. Real estate, utilities and consumer staples struggled.

Both sectors of communication services and technology climbed about 0.8 percent, underpinning tech-heavy Nasdaq.

On the economic front, U.S. consumer price index (CPI), or cost of living, was unchanged in November after rising 0.3 percent in October, the labor department said on Wednesday. The reading was in line with market forecasts.

Another closely watched measure of inflation, the so-called core CPI that strips out volatile food and energy costs, rose 0.2 percent last month.