31.   Bond yields fall as demand drives prices higher.

32.   A booming economy is also driving home prices in Portland, as an expanding electronics industry attracts more workers.

33.   A conflict in the Persian Gulf could limit oil supply and drive oil prices higher.

34.   A combination of factors is driving prices up, Elder and other sources said, not the least of which is a strong U.S. economy.

35.   A balanced budget could drive bond prices higher because the supply of Treasuries would dwindle as the government sold less debt.

36.   A heavy harvest again this year has left the country awash in surplus grain and driven commodity prices to historic lows.

37.   A plunge in futures exchange coffee stockpiles also drove prices higher, traders said.

38.   A slump in refinery operations, combined with lackluster heating oil demand this winter, drove crude prices to a seven-month low Monday.

39.   A record number of shares switched hands on both the New York and Nasdaq markets, driving stock prices through two wild up and down cycles.

40.   A rush on flu shots drove prices to record levels, prompting the American Medical Association to condemn price gouging and call for a federal inquiry.