Of course the stock market has not learned its lesson from 1987, and banks are drifting back into the bad loan habit of 2008.  Such a huge, fast rise seems tenuous even to an absolute amateur - me.

"MORGAN STANLEY: A stock market correction is 'looking more likely'"
Joe Ciolli    Oct. 17, 2017, 6:03 AM

http://www.businessinsider.com/stock-market-news-correction-looking-more-likely-morgan-stanley-2017-10

"Most Investors Expect a Stock Market Correction Later This Year -- but They Also Aren't Worried About It"
Stock market corrections are common, and pretty much inevitable. Here's why you shouldn't sweat the next one.
Maurie Backman    (TMFBookNerd)    Oct 14, 2017 at 8:04PM

https://www.fool.com/retirement/2017/10/14/most-investors-expect-a-stock-market-correction-la.aspx

Corrections are normal, and recovery always follows, even if it takes a few years.