The following video is from Friday's Investor Beat, in which host Chris Hill, and Motley Fool analysts Ron Gross and Matt Argersinger dissect the hardest-hitting investing stories of the day.

Second-quarter results for LinkedIn are in, and the numbers are looking good. Profits were up 34%, revenue up 60%, and registered users up 37%. In our lead story on Investor Beat, Matt and Ron look for a downside to LinkedIn's quarter, and whether investors should be buying now.

Also, our analysts discuss four stocks that made big moves on Friday's market. MercadoLibre posts strong second-quarter results. Weight Watchers loses profits and lowers guidance. Westport Innovations' quarterly loss was worse than anyone was expecting. And the soap opera at Dell takes another dramatic turn.

Finally, Ron and Matt each pick a stock they'll be taking a very close look at in the week ahead.

Chris Hill has no position in any stocks mentioned. Fool contributor Matthew Argersinger owns shares of MercadoLibre. Matthew Argersinger has the following options: long January 2015 $25 calls on Westport Innovations. Ron Gross owns shares of Dell. The Motley Fool recommends Bridgepoint Education, LinkedIn, MercadoLibre, Tesla Motors , and Westport Innovations. The Motley Fool owns shares of Bridgepoint Education, LinkedIn, MercadoLibre, Tesla Motors , and Westport Innovations. Try any of our Foolish newsletter services free for 30 days. We Fools may not 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.