41.   A stock rating by a high-profile Wall Street firm will often drive share prices up or down.

42.   After all, profits are the things that are supposed to drive stock prices.

43.   All this cash is driving prices higher and causing differences in yield, or spreads, between junk bonds and Treasuries, to narrow.

44.   Brokers, monitoring the trades electronically, could see that they came overwhelmingly from Shanghai International, apparently trying to obliterate its steep losses by driving the price down.

45.   But despite tales of bears who go even further, illegally conspiring to drive prices down, actual evidence of such misbehavior has been scarce.

46.   But Friday they reacted by driving stock prices toward record highs, suggesting that many think the good times can be sustained.

47.   But he says high productivity can also drive prices up by creating an expectation among investors that corporate earnings will rise.

48.   But last year they began living up to their production cuts, and the futures traders started driving the price up.

49.   But OPEC seemed to recognize that several unknown factors could rapidly drive prices higher.

50.   But some oil-producing country always finds the temptation too great, and begins to cheat on production quotas, flooding the market, driving prices down.