How much household wealth and consumer spending would a stock crash erase?
Core argument: About $42trn, or 20% of Americans' total wealth, sits in American stocks, up four percentage points since the dotcom era, while foreign investors hold $18trn of American shares.
A crash today would have a bigger effect on ordinary Americans than the dotcom bust. Investing has become much easier over the past two decades, and the share of household wealth in the stock market has climbed. About $42T, or 20% of Americans' total wealth is in American stocks - an increase of four percentage points since the dotcom era. By comparison, foreign investors hold $18T worth of American shares. A drop in nominal values on the same scale as the dotcom bust would wipe out $16T, or 8% of American household wealth. Foreign investors would lose $7T. These totals do not include indirect holdings-such as investments via pension funds and life-insurance companies-of which American households have some $20T. Economists usually expect falls in the stock market to lead to reduced spending elsewhere. A rule of thumb suggested by one study is that every $100 drop in stock market wealth leads, on average, to a $3.20 drop in consumer spending. Under such an assumption, a dotcom-style crash would cut American consumption by about $890bn, or 2.9% of GDP.






