Asian equities were sharply sold off on Wednesday on mounting concerns that Ukraine was on the brink of a civil war.
Stocks fell Tuesday after American International Group reported a decline in profit.
The Treasury auctioned $29 billion in three-year notes at a high yield of 0.928 percent. The bid-to-cover ratio, an indicator of demand, was 3.40.
European stocks closed lower on Tuesday, as continued violence in Ukraine and mixed earnings results made investors uneasy.
Gold ended higher, extending the previous session's gains, as simmering tensions in Ukraine and a break above a key chart level fueled buying.
U.S. crude rose as expectations of a build in inventories were undermined by record low stocks at the benchmark's Cushing delivery point.
Asian stocks were mixed on Tuesday in holiday-thinned trade with markets in South Korea, Hong Kong and Japan shut.
U.S. stock index futures pointed to a flat open on Tuesday, ahead of several first-quarter earnings and trade data for March.
Stocks shifted between gains and losses Monday.
Treasurys pared gains driven by global investors seeking shelter in government bonds and other safe-haven assets from increasing tensions in Ukraine.
Crude fell on Monday, pressured by reports that China's manufacturing sector contracted and Libya's oil output was recovering.
Gold gained as rising geopolitical tensions and heavy short-covering helped it reverse a sharp sell-off after encouraging US nonfarm payrolls data.
The yen rose to a two-week high against the dollar on Monday after a survey showing China's manufacturing activity contracted.
Positive signs from the US economy have failed to boost the greenback, while tensions in Ukraine are driving traders to the yen.
Asian stocks ended mostly higher on Monday but trading volumes were thin with Japanese and South Korean markets shut for holidays.
U.S. stocks declined Friday as unrest in Ukraine offset the US jobs report.
U.S. stock index futures pushed lower on Monday, as shares in Europe fell on concerns about escalating violence in Ukraine.
Yields jumped to session highs after the US employment report, while that on two-year notes climbed to one-month peaks.
European markets closed lower in trade on Friday, despite a better-than-expected U.S. jobs number.
Gold settled lower for a second session on Thursday, hurt by the Federal Reserve's vote of confidence in the U.S. economy.