> He could sell some shares to pay the tax (and would be > left with over $20 billion of Facebook stock after tax), > or borrow to pay the tax. > > If his Fa

> He could sell some shares to pay the tax (and would be > left with over $20 billion of Facebook stock after tax), > or borrow to pay the tax. > > If his Facebook shares decline in value next year, he’d > get a refund. What happens if the market goes through a downturn and the government has to refund all the superwealthy their taxes? I can imagine this working well in a bull market, but when a bear comes around the corner it could be disaster for the budget.