Apple has a "quality" problem—what to do with all its cash, TD Ameritrade chief strategist JJ Kinahan said on Monday. Investors are betting a chunk of it will be returned to them.

In fact, Kinahan said his firm's clients have bought a lot of Apple this month. It was also TD Ameritrade's No. 1-held stock last year and No. 1 stock traded last year, he added.