US STOCKS-Wall St slips after three-day rally; Wal-Mart weighs
* Wal-Mart falls after cutting forecast
* IBM up on Morgan Stanley upgrade
* Oil pull back after U.S. stockpiles rise
* Dow up 0.06 pct, S&P off 0.11 pct, Nasdaq off 0.47 pct (Updates to late afternoon)
By Lewis Krauskopf
Feb 18 (Reuters) - Wall Street edged lower on Thursday as Wal-Mart shares dragged on major stock indexes after a lackluster earnings report and investors locked in gains after a three-day rally.
Seven of the 10 major S&P sectors were lower, led by 0.5 percent declines for financials and energy, which had helped drive the recent rally.
Wal-Mart Stores Inc fell 2 percent after the world's largest retailer reported a lower quarterly profit and gave a tepid sales outlook. The stock was the biggest percentage loser in the Dow index.
While the S&P 500 and Nasdaq were lower, the Dow edged higher, helped by IBM, which rose 5.3 percent after Morgan Stanley upgraded the stock to "overweight." Continuación...