Never expect to make money. It's always a pleasant surprise. The only way to actually guaranteed to make money is U.S. government bonds of the series I or EE, which actually increases in value through interest rates on the money you loaned the government, and it is always above inflation (what you put in will always be worth more than the value of inflation.)
Above officially declared inflation*
Forgot the FTFY.
I thought of that, but this was me trying to keep it succinct.