More from the Author

• Article | Review of Financial Studies | September 2018

  Asset Price Dynamics in Partially Segmented Markets

  Robin Greenwood, Samuel G. Hanson and Gordon Y. Liao

  We develop a model in which capital moves quickly within an asset class but slowly between asset classes. While most investors specialize in a single asset class, a handful of generalists can gradually reallocate capital across markets. Upon the arrival of a large supply shock, prices of risk in the directly impacted asset class become disconnected from those in others. Over the long run, capital flows between markets and prices of risk become more closely aligned. While prices in the directly impacted market initially overreact to the supply shock, we show that prices in related asset classes underreact under plausible conditions. We use the model to assess event-study evidence on the impact of recent large-scale asset purchases by central banks.

  Keywords: System Shocks; Asset Pricing;

  Citation:

  Greenwood, Robin, Samuel G. Hanson, and Gordon Y. Liao. "Asset Price Dynamics in Partially Segmented Markets." Review of Financial Studies 31, no. 9 (September 2018): 3307–3343. (Internet Appendix Here.)  View Details

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• Article | Journal of Financial Economics | August 2018

  Extrapolation and Bubbles

  Nicholas Barberis, Robin Greenwood, Lawrence Jin and Andrei Shleifer

  We present an extrapolative model of bubbles. In the model, many investors form their demand for a risky asset by weighing two signals: an average of the asset’s past price changes and the asset’s degree of overvaluation. The two signals are in conflict, and investors “waver” over time in the relative weight they put on them. The model predicts that good news about fundamentals can trigger large price bubbles. We analyze the patterns of cash-flow news that generate the largest bubbles, the reasons why bubbles collapse, and the frequency with which they occur. The model also predicts that bubbles will be accompanied by high trading volume and that volume increases with past asset returns. We present empirical evidence that bears on some of the model’s distinctive predictions.

  Keywords: bubble; extrapolation; volume; Price Bubble; Mathematical Methods;

  Citation:

  Barberis, Nicholas, Robin Greenwood, Lawrence Jin, and Andrei Shleifer. "Extrapolation and Bubbles." Journal of Financial Economics 129, no. 2 (August 2018): 203–227.  View Details

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• Working Paper | HBS Working Paper Series | 2018

  The Impact of Pensions and Insurance on Global Yield Curves

  Robin Greenwood and Annette Vissing-Jorgensen

  We document a strong effect of pension and insurance company (P&I) assets on the long end of the yield curve. Using data from 26 countries, the yield spread between 30-year and 10-year government bond yields is negatively related to the ratio of pension assets (in funded and private pension and life insurance arrangements) to GDP, suggesting that preferred-habitat demand by the P&I sector for long-dated assets drives the long end of the yield curve. We draw on changes in regulations in several European countries between 2008 and 2013 to provide well-identified evidence on the effect of the P&I sector on yields and to show that P&I demand is in part driven by hedging linked to the regulatory discount curve. When regulators reduce the dependence of the regulatory discount curve on a particular security, P&I demand for the security falls and its yield increases. We describe settings in which pension discount rules can have a destabilizing impact on bond markets.

  Keywords: pension funds; Investment Funds; Insurance; Assets; Interest Rates; Bonds;

  Citation:

  Greenwood, Robin, and Annette Vissing-Jorgensen. "The Impact of Pensions and Insurance on Global Yield Curves." Harvard Business School Working Paper, No. 18-109, June 2018.  View Details

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