On Monday's edition of Investor Beat, host Chris Hill and Motley Fool One analyst Jason Moser take a hard and fast look at the biggest investing stories as we step into the holiday retail season.

Shares of 3M (NYSE:MMM) have been beating the market in 2013 but fell today after getting downgraded by Morgan Stanley. Groupon (NASDAQ:GRPN) had a similar day, as the daily-deal stock is up big in 2013 but pulled back today on news of a downgrade from Goldman Sachs. And finally, Twitter (NYSE:TWTR) dropped a bit today now that the company's quiet period has ended, as five analysts came out with their first reports on the company. In this segment, Chris and Jason discuss three stocks making moves on the market today.

Chris Hill has no position in any stocks mentioned. Jason Moser owns shares of Twitter. The Motley Fool recommends 3M and Goldman Sachs. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.