Editorial companion

What stands out

The clip argues a handful of mega-cap tech names are carrying recent market gains by making up 21 percent of the S&P 500, and it shows how concentrated the rally has been: Nvidia and Microsoft account for most of the upside while Apple is not keeping pace. The discussion surfaces the tension between a market that looks healthy on headline indexes and one that relies on a very small group of stocks to do the heavy lifting. That concentration is the clearest takeaway from the short segment.