"For every action there is an equal and positive reaction."

That old saying not only holds true in physics, but in the financial markets as well.

Today's the day when a new report from Gartner cited that strong BlackBerry sales in the first quarter of this year have pushed the device and its associated OS past palmOne (Treo).

So let us, then explore the action/reaction theory as it played out today:

On the Nasdaq:

palmOne-$23.41 a share, down 1.93 percent from yesterday's $23.87;
Research In Motion- $68.14 a share, up 4.93 percent from yesterday's $64.94.

Point proven.

Oh, just a quote before I go, to whom it may concern:

Toronto Stock Exchange- $84.60 a share, up from yesterdeay's $81.10 close.