After one of the best, longest bull market runs in history, the continuing downhill trajectory of the stock market has lots of investors wondering what — if anything — they could and should be doing. At a time of an evolving pandemic, an expanding European war and major climate concerns, at first glance the answer is: probably not much!For many investors, the Thrift Savings Plan will provide anywhere from one-third to half their income in retirement. Assuming, of course, there is income!So what should you do, or not do? We’ll find out today on our Your Turn show with guest host Arthur Stein. He’s a Washington-area financial planner whose clients include many active and retired feds, including several self-made TSP millionaires.