Since the lows in October, the S&P 500 index has gained over 15%; one month into 2023, and it's up over 7% already. It could be the start of the next bull market, or a dreaded "bear market bounce" with declines continuing after a false start. Whether you're worried about a bounce or you're more optimistic, Costco Wholesale (COST -0.55%) is worth buying, according to Motley Fool contributors Jason Hall and Jeff Santoro. They break down why in this video. 

*Stock prices used were from the afternoon of Jan. 19, 2023. The video was published on Feb. 4, 2023.