The Dow Jones Industrial Average and the S&P 500 were trading near session lows Tuesday afternoon, with the decline wiping out all of April's advance. The Dow was most recently off about 570 points, or 2.3%, at 23,877, pushing it to a monthly decline of 1%. The equity gauge also is on the verge of ending lower for five straight sessions, which would market its longest skid since the end of March of 2017. A steep selloff in shares of 3M Co. was contributing about the lion's share of the 121-year-old benchmark's intraday fall, coming after the industrial giant reported earnings that failed to inspire the buying mood. Meanwhile, the S&P 500 index was down 1.8% at 2,622, pushing the index to a monthly loss of 0.7%. The Nasdaq Composite Index meanwhile, was down 2.2% at 6.971, with the session's drop for the technology-laden index erasing its monthly advance. The index was down 1.2% so far in April.