SAN FRANCISCO (MarketWatch) -- Oil futures ended modestly lower Monday as worries about Spain's rising cost of debt kept fears of decreased demand in the front burner.
- Other energy products ended lower, with natural gas the outlier, with the July contract up 6.8% on warmer-than-normal weather predictions in most of the U.S. The contract ended 17 cents higher at $2.64 per million British thermal units.