Given how the first few weeks of January have played out, I feel sorry for anyone who chose as a New Year’s resolution to check their retirement accounts more assiduously. Stocks hit a 15-month low last Friday. Analysts cite a number of factors in the slowdown – China’s economic woes, the strong dollar – but the biggest culprit appears to be the dip in the price of oil, from a high of $100 a barrel in mid-2014 to under $29 a barrel, which is over three times cheaper than the price of the barrel itself. By the way, the Iranian nuclear deal, which will allow the major oil producer to return to global markets, makes future price prospects worse, not better.