New York ? Caution reasserted itself on Wall Street, sending stocks down sharply but not enough to stop the market from notching its third straight weekly advance.

Major indexes fell about 2 percent Friday, but most analysts agreed the pullback was a natural response to the market’s powerful climb this month. Financial and technology stocks led the retreat, and energy shares fell along with the price of oil.

A dip in personal incomes and a slowdown in personal spending gave investors reason to cash in some of their winnings after the Dow Jones industrial average surged 21 percent over just 13 days. Analysts said the sentiment in the market was still more upbeat than it was a month ago, but the data were a reminder that the economy and the banking system remain troubled.

“There is still a definite caution in the air,” said Doreen Mogavero, president of Mogavero, Lee & Co., a New York floor brokerage, adding that she’s noted some hesitance among her clients. “I don’t think people are completely invested yet.”

Mogavero noted that the money that has gone into the market over the last few weeks has been “short-term” in nature, which leads her to believe that most people are not convinced that the economy will soon recover.

The market has been ratcheting up and down over the past week. Analysts weren’t surprised by its retrenchments, including Friday’s, because no one expects such a weak market to move consistently higher. And many analysts believe back-and-forth trading is actually a healthy way for stocks to recover, because it reflects a conservative rather than euphoric attitude among investors.