Lec Last - The Leverage Cycle and Crashes

"Lec Last - The Leverage Cycle and Crashes" Financial Theory (ECON 251) In order to understand the precise predictions of the Leverage Cycle theory, in this last class we explicitly solve two mathematical examples of leverage cycles. We show how supply and demand determine leverage as well as the interest rate, and how impatience and volatility play crucial roles in setting the interest rate and the leverage. Mathematically, the model helps us identify the three key elements of a crisis. First, scary bad news increases uncertainty. Second, leverage collapses. Lastly, the most optimistic people get crushed, so the new marginal buyers are far less sanguine about the economy. The result is that the drop in asset prices is amplified far beyond what any market participant would expect from the news alone. If we want to mitigate the fallout from a crisis, the place to begin is in controlling those three elements. If we want to prevent leverage cycle crashes, we must monitor leverage and regulate it, the same way we monitor and adjust interest rates. 00:00 - Chapter 1. Introduction 02:15 - Chapter 2. Understanding Leverage 13:45 - Chapter 3. Supply and Demand Effects on Interest Rates and Leverage 21:52 - Chapter 4. Impatience and Volatility on Setting Leverage 34:48 - Chapter 5. Bad News, Pessimism, Price Drops, and Leverage Cycle Crashes 48:01 - Chapter 6. Can Leverage Be Monitored? Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses This course was recorded in Fall 2009.

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