Art Cashin suspects outside forces are playing a role in the GameStop trading tumult

Art Cashin, director of floor operations at UBS.
David A. Grogan | CNBC

If this week's Wall Street tumult is the David vs. Goliath battle as is being portrayed, David may be getting a little outside help.

That's the view of market legend and historian Art Cashin, the director of floor trading at UBS, who has seen some of these so-called short squeeze battles play out before, and knows of a number of others through history.