In this video from Monday's edition of Investor Beat, host Chris Hill and Motley Fool analysts Taylor Muckerman and Matt Argersinger dig into the biggest investing stories from the market today.

AOL CEO Tim Armstrong announced over the weekend that the company will reverse a recent change to its 401(k) plan. The company had recently shifted to giving employees a lump-sum contribution rather than matching throughout the year, a move that saves the company money, but isn't beneficial for employees. Armstrong said that part of the change was due to "two distressed babies" in 2012, which cost the company about $1 million each. Armstrong has since apologized for the remark. In the lead story on today's Investor Beat, Matt and Taylor discuss the recent trend toward lump-sum contributions to 401(k) plans, why this is beneficial for companies, and why it isn't ideal for employees.

Then, the guys look at four stocks making moves on the market today. Shares of Boardwalk Pipeline Partners fell through the floor today, hitting a 52-week low after fourth-quarter results for the natural gas transporter were weak, but the real story was the company cutting its distribution by 80% for the upcoming quarter. Chinese gaming company Changyou.com had pretty good revenue and profits for its fourth quarter, but shares fell after the company announced disappointing guidance. Fourth-quarter profits for Hasbro fell slightly because of falling sales in the U.S. and Canada, but enthusiasm over international sales, as well as the company's increased dividend and restructuring of its share repurchase plan, saw shares up on the news. And Tesla Motors doesn't report earnings until next week, but shares hit a new all-time high today on investor anticipation ahead of the report.

And finally, Taylor looks at Goldcorp and says he'll be watching to see how the company readjusts its forward expectations now that the price of gold has begun to recover. Meanwhile, Matt will be looking at Zillow, and gives investors three things he's going to be watching closely with the company when it reports earnings on Wednesday.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.