Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Is there data and proof that a diversified portfolio can generate higher returns than the S&P 500 Index?
Yes, a diversified portfolio can generate greater returns than the S&P 500 by going OUTSIDE it. For instance, small stocks (on average) generate higher returns than the "large caps" found in the S&P 500. So if you own a diversified portfolio of stocks, some of which are smaller (in market cap) than the typical S&P 500 stock, you have a chance to outperform. You might also outperform by owning other asset classes than stocks such as gold, real estate, and timber (among others) at appropriate times. (You may also be able to get the relevant exposure by owning gold and timber stocks and REITS.) This was a lesson that David Swensen of the Yale endowment taught us.