Comment on Everyday AI looks more like the '08 housing bubble
Djehngo@lemmy.world 8 hours agoI think it’s hard to definitely call something a bubble until it pops.
The definition of a bubble goes something along the lines of market prices exceeding the intrinsic value of the investment they represent, which may be true here?
If you want to read more about this the rough name for these companies was “the magnificent seven” a year or so ago when I last looked at this. A quick Google suggests represent about a third of the SNP 500’s value now and have a cape ratio (cyclicly adjusted price to earnings) of ~37 compared to 15-20 being normal.
I can’t find a good numerical source for the correlated risk within this group, and I suspect analyzing it is very difficult. Given they all used to be a lot more diversified in the past but now a large % of their valuation is predicated on AI historical correlation analysis probably fails. But the diagram linked here suggests it’s probably bad to put all your money in these companies. (Or even a 3rd if you are in an s&p 500 index tracker 😶)
Like, none of this definitively says this is a bubble, since if it were possible to divine that the bubble would immediately pop, but it does suggest there is a strong likelihood we are seeing a bubble.
sugar_in_your_tea@sh.itjust.works 7 hours ago
15-20 was normal for the 100 years ending 40-50 years ago. But of we look at the last 40 years or so, the CAPE has been higher, suggesting that we don’t know how what “normal” looks like going forward. More people are buying stocks than ever before due to retirement plans and poor bond yields, which pushes up the PE.
So whether ~40 is high for a PE going forward isn’t clear. The CAPE hit ~45 in the 2000 crash, and reverted to ~20 after the crash, yet the 2008 crash only hit ~26 and crashed down to ~14 and quickly bounced back to ~20. The 2008 had little to do with CAPE and more to do with corruption in the banking industry, whereas 2000 was almost purely oversized hype in the burgeoning tech market.
So is the normal range 20-30? Idk. Maybe 20 is actually low going forward, it’s unclear. Either way, 40 isn’t as outlandish as it was in the 2000s, and that pushed up to 45 before crashing.
Agreed. But if you drop out of the market and invest in other stuff, you would miss whatever the rest of the runup will do before it bursts, which could leave you worse off than someone just investing in the entire market by market cap. Ot could continue to run for 10-20 years, or it could pop this year, it’s impossible to know since it relies heavily on investors continuing to believe the hype and companies continuing to have something to back up that hype.
Djehngo@lemmy.world 6 hours ago
Valid, I got 15-20 from a Google search, but further research puts your numbers as more reasonable, I will edit the patent post.
sugar_in_your_tea@sh.itjust.works 4 hours ago
I don’t think anyone should trust my numbers either. Here’s the CAPE data, make your own decision as to whether the CAPE ratio makes sense going forward.