Wall Street slips in volatile trade after dropping 2% at session start

US stocks slipped in volatile trading on Tuesday following the biggest one-day declines for the S&P 500 and Dow in more than six years.
Major indexes swung from negative to positive and back after starting the session down 2 percent.
The sharp declines in recent days have marked a pullback long-awaited by investors after the market has minted record high after record high.
"Put your seatbelts on.

It's going to be a volatile ride for the next several trading sessions," said Chad Morganlander, portfolio manager at Washington Crossing Advisors in Florham Park, New Jersey.
"Fundamentals are moving forward in a positive way, which gives us confidence that in the long run you'll continue to see higher highs within the markets."