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 that person invested $10,000 in Stock A and received a 5% return while Stock B makes a 7% return, the opportunity cost is 2%. One way of conceptualizing opportunity cost is as the amount of money one could have made by making a different investment decision. Importantly, opportunity cost is not a type of risk because there is not a chance of actual loss.