With our most reliable stock market valuation measures at the highest extremes in U.S. history, record negative readings on our most reliable 'equity risk premium' gauge (estimated S&P 500 total returns vs. Treasury yields), and the narrowest junk bond risk premiums in history, it’s useful for investors to remember that a market crash is nothing but risk-aversion meeting a market that is not priced to tolerate risk. Emphatically, nothing in our investment discipline relies on a market colla...