not just wrong...The Worst Stock Tip in History.
It seems he was redeemed somewhat but only posthumously.
"At this time 85 years ago, Yale economist Irving Fisher was jubilant. “Stock prices have reached what looks like a permanently high plateau,” he rejoiced in the pages of the New York Times. That dry pronunciation would go on to be one of his most frequently quoted predictions — but only because history would record his declaration as one of the wrongest market readings of all time."