NEW YORK — The stock market looks tired.

Stocks closed mixed for a second day yesterday after investors grew pessimistic about the market's ability to keep its rally going. The Dow Jones industrial average rose 9 points; it had been up as much as 68 after European leaders announced a plan to help Greece with its debts. A similar advance and retreat occurred Thursday.

There wasn't a clear reason for stocks' retrenchment yesterday. But analysts said the market does need a break from a climb that has gone on two months with few interruptions. The Dow has advanced 17 of the past 21 days.

Even with the mixed finish, major stock indexes still managed to rise for a fourth straight week.