A pot-stirring strategist for a huge institution teamed up with a mathematician to call BS on the financial industry’s embrace of bad math. Half academic paper, half fiery screed, this chart-heavy essay by Richard Wiggins and Michael Edesess became II’s most-read opinion piece of the year almost overnight. In second place? Another Wiggins takedown. Read all five of this year’s most popular columns. And when one of them infuriates you, write us a rebuttal.