As I’ve observed before, the back-story is that Babson’s presentation began as follows: “I’m about to repeat what I said at this time last year, and the year before…” The fact is that Babson had been “proven wrong” by an advance that had taken stocks relentlessly higher, doubling during those two preceding years. Over the next 10 weeks, all of those market gains would be erased. If Babson was “too early,” it certainly didn’t matter. From the low of the 1929 plunge, the stock market would then lose an additional 79% of its value by its eventual bottom in 1932 because of add-on policy errors that resulted in the Great Depression.
To slightly paraphrase Ben Hunt, how does something go down 90%? First it goes down 50%, then it goes down 80% more.