A Cycle of Financial Fragility?
(click image above to enlarge)
Can a bull market founded largely on credit survive? A forthcoming Levy Institute working paper I wrote with Tai Young-Taft of Bard College at Simon’s Rock (link for those interested) represents an attempt to deal with the role of financial instability—along with other sources of economic fluctuations—in the dynamics of the economy. Here, I’ll focus mostly on the role of margin loans that are used by many investors and traders to leverage positions in stock. The model developed in the paper includes a role for several policy tools that might be used in attempts to stabilize the economy: a fiscal-policy rule with public production and unemployment rate targets, along with public-sector R&D, financial supervision and regulation, and a target for the inflation-adjusted interest rate on government debt.
Now, for the current situation. The figure above highlights one potential threat to stability designed to arise spontaneously in runs of the model: surges in the use of margin debt to finance investments in stock. The chart shows that the amount of such debt outstanding in the US relative to GDP rose sharply during the tech bubble and the period leading up to the financial crisis and recession of 2007–09, achieving a new peak each time. Subsequent financial market collapses led to cyclical declines in the use of this form of leverage. On average, for the first quarter of 2015, this ratio stood at more than .028, suggesting that the stock market’s vigor again rests to a great extent on heavy borrowing (see figure). (Moreover, some different but closely related uses of credit, such as bond issues that wind up financing stock buybacks, have also contributed to the post-recession bull market.) This column from the New York Times’s Floyd Norris from a couple of years back discussed evidence that margin-credit cycles helped fuel cyclical movements in stock prices and the economy. His column displayed a longer but now outdated margin loan series.
In the model, margin loans can generate positive feedback effects: a cycle of increasing margin loan balances and rising stock prices, or vice-versa. The story is similar to that of the “levered losses” in housing that took place in a number of countries earlier in this decade (see the recent book House of Debt for one account of the story, although even in this version of the story, I am inclined to see excessive optimism about the usual cure by wage and price adjustments); indeed, big, unsustainable run-ups in asset prices tend to be driven at least in part by credit booms. The situation shown in the figure is only one of many somewhat worrisome signs of market fragility. At the moment, fragility generally seems to be manifested most clearly in big increases in the quantities of various assets and liabilities relative to flow variables such as income and GDP, rather than in yield data.
More on the new paper and the model in it, for those inclined to look into it: continue reading…
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