It already dropped 50% from ATH last January, not like it just started dropping. The monthly and yearly uptrend hasn't been broken since XBI began in '06 and that is showing a 82.75ish floor for both. Not saying it won't happen now or ever, just that it hasn't ever yet. Price is currently under 2018 levels.Nice looking chart, but I don't think it's done falling yet. Most of the companies in the index are not profitable, which in itself isn't a big deal, but what's different about this pullback from the others is inflation. Inflation is driving sector rotation. Companies with high valuations, and especially ones that aren't profitable are getting hammered.
If it were me, I'd let it settle down and make a new base before establishing or adding to a position as there's no near term catalyst to send it up other than a dead cat bounce. Fighting a stampede never ends well.
I expect some big pharma acquisitions with those billions in covid cash, I think Pfizer made something like $36 billion just on the vax in 2021. There are also over 100 biotechs with a market cap under their current cash on hand. The sector got hammered all of 2021.