You didn't took into account that rich people can use more of their income for investments, to leverage and to spend more time to use marked fluctuations in the

You didn't took into account that rich people can use more of their income for investments, to leverage and to spend more time to use marked fluctuations in their favor. Your example looks correct. But I don't see how is the common case. Middle class investors usually don't have more percentage in the market that the 0.1%. Most middle class main investment is the home they live in.