Investors most likely are waiting for news from employment reports Thursday and Friday. The trading day started rather poorly as eurozone issues were present once again. Oh dear, I did suggest they'd be present sometime in the first quarter but not as quickly as the second trading day.
Oil prices were lower early as the dollar weakened and demand from the eurozone was perceived to weaken with debt news. But, late in the day there was news the EU was going to be "all-in" on Iran sanctions which lifted the price of oil off their lows and will no doubt increase the bluster from Iran.