Stocks looked to plunge at the opening of trading Monday and Treasury prices soared as investors around the world feared that consumers are too anxious to help lift the economy into recovery.

U.S. stock futures fell sharply after overseas markets extended the heavy selling that began on Wall Street Friday. That pullback followed a weaker than expected reading on consumer confidence.

The Shanghai stock market fell almost 6 percent and the major indexes in Europe were all down more than 1.5 percent.

Oil prices also continued to fall sharply, reflecting the growing concerns about a weak economy that will curtail demand for energy.

Dow Jones industrial average futures fell 159, or 1.7 percent, to 9,162. Standard & Poor's 500 index futures declined 19.50, or 1.9 percent, to 986.30, while Nasdaq 100 index futures declined 26.00, or 1.6 percent, to 1,589.00.

Meanwhile, bond prices rose as investors, once again wary about the stock market, sought the safety of Treasurys. The yield on the benchmark 10-year Treasury note, which moves opposite its price, fell to 3.50 percent from 3.57 percent late Friday.

Overseas, Japan's Nikkei stock average fell 3.1 percent as investors weren't satisfied by news that the country had emerged from recession in the second quarter. In afternoon trading, Britain's FTSE 100 fell 1.5 percent, Germany's DAX index fell 1.6 percent, and France's CAC-40 fell 2.1 percent.

After sending stocks higher for five months on expectations of an economic recovery, investors are now worried that they have been too optimistic given consumers' continuing reluctance to spend.

Friday's drop on Wall Street was triggered by a sharp drop in the Reuters/University of Michigan consumer sentiment index, which followed a surprisingly weak July retail sales report from the Commerce Department. While other parts of the economy, including housing and manufacturing, are showing signs of progress, the country cannot have a strong recovery unless consumers are spending more freely. Their spending accounts for more than two-thirds of economic growth.

Traders will get more insight into consumers' mindset as retailers report second-quarter earnings this week. Last week, the nation's largest retailer, Wal-Mart Stores Inc., said its most important sales figure, those from stores open at least a year, fell during the April-June period.

Among companies reporting results early Monday, Lowe's Cos. said poor weather and cautious consumer spending caused sales to fall 19 percent in the second quarter. The home improvement retailer missed analysts' forecasts.

Oil prices hovered around $66 a barrel in pre-opening trading on the New York Mercantile Exchange.

The dollar rose against other major currencies, while gold prices fell.