US STOCKS-Dow, S&P 500 slip with energy, Wal-Mart; Nasdaq gains
* Decline in oil prices weighs on energy shares
* Priceline rallies after results, Wal-Mart down
* Dow down 0.24 pct, S&P down 0.11 pct, Nasdaq up 0.37 pct (Updates to afternoon trading)
By Caroline Valetkevitch
NEW YORK, Feb 19 (Reuters) - The Dow and S&P 500 eased on Thursday following declines in energy shares and a disappointing outlook from Wal-Mart, while the Nasdaq hit another 15-year high as Priceline shares jumped.
Uncertainty over prospects of a debt deal with Greece added to investor caution. Germany rejected a Greek proposal for a six-month extension to its euro zone loan agreement, saying it fell short of conditions set out by the country's euro zone partners.
A drop in shares of Wal-Mart Stores Inc weighed down the Dow after the company cut its sales outlook, citing the stronger dollar. Shares dropped 3.2 percent to $83.52. Wal-Mart also said it would raise entry-level wages to $9 an hour.
Boosting the Nasdaq, which rose for a seventh straight session, Priceline Group shares rallied 8.5 percent to $1,218.05 on its results. The stock also was the S&P 500's largest daily percentage gainer.
The S&P energy index fell 0.8 percent while shares of Exxon Mobil dropped 1.7 percent to $89.44 as oil prices slid a second day following another big weekly build in U.S. crude inventories. Continuación...