History demonstrates that participants in financial markets are susceptible to waves of optimism. Excessive optimism shows the seeds of its own reversal in the form of imbalances that tend to grow over time.
Alan GreenspanAny onset of increased investor caution elevates risk premiums and, as a consequence, lowers asset values and promotes the liquidation of the debt that supported higher asset prices, ... This is the reason that history has not dealt kindly with the aftermath of protracted periods of low risk premiums.
Alan GreenspanI do not deny that many appear to have succeeded in a material way by cutting corners and by manipulating associates, both in their professional and in their personal lives. But material success is possible in this world and far more satisfying when it comes without exploiting others.
Alan Greenspan