A recent tweet from Matthew Yglesias made me smile: 'Tis the season for large cash withdrawals in anticipation of holiday tipping — Matthew Yglesias (@mattyglesias) December 17, 2015 Inspired, I've updated my December 2012 Merry Cashmas chart showing the annual Christmas and New Year's cash demand spike. See below. Tipping might certainly be one reason for the annual cash spike, but I'd bet if you look at data from Europe where tipping is not a tradition you'll still see a jump. Because we can't anticipate all the random events that will arise when we travel long distances to meet our loved ones, we purchase insurance in the form of larger cash holdings. Thus you can see a consistent seasonal spike in currency in circulation in the weeks before Christmas. Those amounts falls heavily in January. Having returned to our regular schedules, insurance against uncertainty is no longer necessary so we redeposit our cash at the bank. The U.S. Christmas spike has gotten...