Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Quad/Graphics (Nasdaq: QUAD) rose as much as 10% before closing up 9% on the day. Investors appear to be buying the rebound now that the stock has bounced off Monday's 52-week low.

So what: A mixture of common and Big Money buyers may have driven the gains. Volume closed up 59% with more than 282,000 shares trading hands during the day.

Now what: The timing is also interesting. Quad/Graphics mounted a renewed assault on R.R. Donnelley's (NYSE: RRD) interactive print business with new products unveiled during this week's conference of the Direct Marketing Association. Do you believe Quad/Graphics will be successful? Would you buy shares at current prices? Please weigh in using the comments box below.

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