The above video is from Wednesday's MarketFoolery podcast, in which host Chris Hill, along with analysts Bill Barker and Alex Scherer, discuss the top business and investing news. In this segment the focus is on Costco's (COST -0.55%) 4th-quarter earnings, which came in better than expected. As a result, shares were up 4% Wednesday morning, trading at an all-time high. Listen in on the full discussion for the guys' analysis of Costco’s business model and Alex's theory on what he considers to be the company’s "secret weapon" for success.

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