Mutual funds. They are diversified sufficiently to protect their value. Some of their investments gain, some lose as a result of being long term investments. So as the daytraders make prices of stock fluctuate, the bond gains/loses throughout their portfolio. However, if they are sufficiently diversified, they will experience slow, long term gain. They are considered low risk, slow reward. Regular Portfolios should try to find a stock with proven returns, and invest a percentage into them, if they are not in a rush... Just like real mutual funds.
Personally, I don't look for the shorts, I look for the good longs. My 2cents