When Shiga toxin is released from an E. coli O157:H7 bacterium, it can translocate to organs other than the digestive tract such as the kidneys and central nervous system (brain and spinal cord). This can cause hemolytic uremic syndrome (HUS) and/or thrombotic thrombocytopenic purpura (TTP) .
A strategy called dollar-cost averaging can help reduce risks surrounding an asset falling in price. The concept is straightforward - you invest a fixed amount of money in an asset once every fixed time period.
If you practice dollar cost averaging in your Roth IRA or invest periodically, your five year clock does not restart with every investment. Instead the clock only starts with regular Roth IRA contributions in the very beginning with the first contribution ever to be placed into the Roth.