OT - Bought a bit of ROBO and NVDA for my retirement acct - altho I may just use them as a trade, as momentum seems to be driving them strongly. Did a tad of research and there is at least one other robotics/AI ETF symbol BOTZ. Is a somewhat interesting take on the sector, with lower management fee, altho managment fees, at less than 1%, are not terribly material. BOTZ has NVDA, and ISRG, which I already own directly, and some of the other companies are also components of ROBO.  And has mirrored ROBO's ascendance in the same time frame. I see the sector rather like networking - in the end, applications will continue to multiply. ROBO has had its large appreciation in the past 12 months or so, and I haven't really looked at whether PEs are outrageously inflated by expectations, rather than results. Although at least some of the companies have been around for a long time.

In general, it's hard to make a bad pick in this market, given the momentum that just won't quit. (At least, not yet.)