Oil shrugged off a barrage of threats over the crisis in Ukraine, slipping ahead of the weekend on profit taking and healthy supplies in N. America.
Gold prices ended below $1,300 an ounce on Monday, but were underpinned by concerns that tensions in Ukraine could escalate.
U.S. oil ended higher while Brent crude was hammered below $109, amid signs that Libya may soon reopen a small oil port.
The Treasury auctioned $29 billion in seven-year notes at a high yield of 2.317 percent. The bid-to-cover ratio was 2.60, vs a recent average of 2.55.
Asian shares were mixed on Tuesday while liquidity was thin with Japanese markets shut for a public holiday.
U.S. stock index futures pointed to a higher open on Monday, after Pfizer confirmed it had made a second bid for AstraZeneca.
Stocks rose on Monday, bouncing back after the prior session's drop, amid increased deal activity.
U.S. bonds rose on Friday, as resurging tensions in Ukraine boosted investors' bids for "safe-haven" assets.
Gold ended above $1,300, after hitting its weakest level in 2-1/2 months, as violence in Ukraine weighed on equity markets and the dollar.
Brent crude futures rose on Thursday, holding above $109 per barrel for a fifth straight session.
The dollar struggled against the yen and Swiss Franc as rising tensions in Ukraine offset optimism about U.S. economic growth.
The euro rose to a two-week high against the dollar on Monday, supported by expectations inflation in the euro zone will tick up.
Soft corporate earnings weighed on Asia's major indices on Friday, with Tokyo outperforming on the back of a weaker currency.
U.S. stocks climbed Thursday as earnings from Apple and a better-than-expected durable goods number.
European shares closed higher on Thursday as Ukraine concerns returned to the market.
U.S. stock index futures signaled a lower open on the last day of the week, as fears about the Ukraine-Russia situation resurged.
Gold managed a modest gain, settling above a key technical support level, though it may be vulnerable to further losses as demand remains slack.
Gold was underpinned after Ukrainian forces killed up to five pro-Moscow rebels as they closed in on the separatists' military stronghold in the east.
Japanese shares fell 1 percent on Thursday as investors were disappointed with the lack of a Trans-Pacific Partnership deal.
European markets finished lower on Friday and ended the week flat, as the situation in Ukraine erased any optimism over earnings season.
Get the best of CNBC in your inbox