Although there may be plenty of things in the GOP tax bill to complain about, critics can’t say it didn’t work – at least as far as stock buybacks go. TrimTabs Investment Research said Monday that U.S. companies have now announced $1 trillion in share buybacks in 2018, surpassing the record of $781 billion set in 2015. "It's no coincidence," said TrimTabs' David Santschi. "A lot of the buybacks are because of the tax law. Companies have more cash to pump up the stock price."