The moves could create a positive atmosphere for Chinese and American trade negotiators when they meet next month, but they do not address the most contentious issues standing in the way of a deal, including White House concerns about China’s practice of forced technology transfers by American companies.

For financial markets, the worry has been that the continuing conflict has begun to sap the economy and erode corporate profits.

Unemployment in the United States remains near a 50-year low, but Labor Department data for August showed a slowing in hiring. Key gauges of manufacturing activity suggest that it may be contracting. Business investment has slowed. Analysts expect profits at companies in the S&P 500 to grow a scant 2 percent this year.

But trading in stock and other markets have suggested that investors are less panicked about the risk of a recession. Yields on government bonds, which had plunged this year as investors lowered their expectations for growth, have been moving higher. Oil prices, which flirted with falling below $50 a barrel in early August, have risen too.