The Dow Jones Industrial Average came very close to its 20,000 milestone before falling short and backing off. The blue-chip index came within a point of the level in the afternoon session. Crude oil ended the day with slight gains even after another increase in the number of active oil rigs drilling for crude in the U.S. Baker Hughes (BHI) data showed an increase for the tenth consecutive week in a row. PriceSmart  (PSMT - Get Report) reported a mixed quarter. The warehouse club retailer surpassed earnings estimates, while falling short on sales. PriceSmart said a stronger U.S. dollar and weakness in key regions had hampered its quarterly performance. Amgen (AMGN - Get Report) climbed after a federal judge ruled that drugmaker Regeneron  (REGN - Get Report) had to pull a rival cholesterol drug from shelves. The decision was part of a patent lawsuit.