Nothing focuses the attention like a market rout. The Dow has already suffered its worst start to a trading year since 2008, and the stock-selling stampede looks set to deepen.
China suspended trading abruptly on its stock market for the second time this week. Markets shut within 30 minutes of opening, after a fall of 7 percent.
Analysts are now wondering if we are at a tipping point, marking the end of the long bull market. So if you haven't made some tough new year's investment resolutions, better get to it.