I do a mix of 75% stocks (10% international/emerging markets index funds/65% mid of S&P big, mid size, small cap index funds) and rest in bonds, REITS, treasury bills, cash reserves. I do it long term for retirement hopefully my asset allocation can weather the storm by diversification. It is aggressive but I have 30 years until retirement. I think the key is rebalance annually and have balance mix of investments.