 By JustMarkets The US stock market closed the last trading day of the year with a decrease. Dow Jones index US30 fell by 0.16 1.07 for the week, 4.90 for the month, 20.23 for the year, SP 500 US500 decreased by 0.26 0.68 for the week, 4.13 for the month, 28.79 for the year and the NASDAQ Technology ...... 