Options, warrants, futures, currencies, bonds, ETFs, et al. Check out: http://en.m.wikipedia.org/wiki/Financial_instrument http://en.m.wikipedia.org/wiki/Financ

Options, warrants, futures, currencies, bonds, ETFs, et al. Check out: http://en.m.wikipedia.org/wiki/Financial_instrument http://en.m.wikipedia.org/wiki/Financial_instrument, but obviously, these are often or the more advanced (with the exception of ETFs, which are traded as stocks, or bonds).