What drives swings in U.S. corporate market valuations?
Core argument: Fluctuations in expected cash flows to firm owners, rather than fluctuations in expected rates of return, have been the dominant driver of swings in U.S. corporate market valuations since 1929.
We examine how to quantitatively reconcile the high volatility of market valuations of U.S. corporations with the relative stability of macroeconomic quantities since 1929. Macroeconomic and financial variables are measured in a consistent fashion using the Integrated Macroeconomic Accounts (IMA) of the United States, which combine NIPA data on macroeconomic flows and stocks with comprehensive data drawn from the Financial Accounts of the United States on financial flows and balance sheets with equity measured at market value. [These data] offer an internally consistent set of income statements, cash flow statements, and market value balance sheets for major sectors of the U.S. economy. We find that fluctuations in expected cash flows to firm owners have been the dominant driver of those fluctuations in value; fluctuations in expected rates of return have played a smaller role. We attribute most of the fluctuations in valuations to fluctuations in the share of corporate output flowing to owners of corporations in the form of factorless income, the share of corporate output that flows to firm owners as a pure rent.

