In a year of uncertainty that included a recalcitrant North Korea, Britain's continued exit from the European Union, multiple terrorist attacks, and global populist uprisings, to say 2017 was a turbulent year is a bit of an understatement—except, that is, in stock markets. World stocks, as measured by the MSCI All-Country World Index have risen every month this year, so far. In fact, they haven't had a negative return since October of 2016. As shown by the following graphic, if they were to finish December in the green, it would represent the first year ever without a single monthly decline. And the odds are good for the record continuing, with a positive December so far and just 4 trading days to go.