As of Monday's close, the S&P 500 has officially fallen back below its 50-day moving average, joining both the Nasdaq Composite and the Dow Jones Industrial Average below the key momentum threshold. Here's a breakdown,

US equity indexes are set to close mixed on Tuesday, paring a portion of its midday slide that followed the Conference Board reporting a larger-than-expected decline in consumer confidence during February and sparking a sizable drop in government bond yields as investors weighed the relative health of the US economy and global trade.