$10$

Samantha Ahangar has just received $$22,000$ from an uncle who died and is trying to decide how to invest it$.$ She has done some research and has decided that about $30$ percent of the money should go into large$-$cap stocks, $20$ percent into medium$-$cap stocks, $15$ percent into small$-$cap stocks, $10$ percent into bonds, $10$ percent into foreign stock, and $15$ percent into cash. She thinks that even if one area does not do that well, the rest will so that her overall return will be pretty good. What aspect of investing is Samantha most concerned about?