The extreme turbulence of the financial markets in August resulted in a temporary rise in the Vix measure of US equity market volatility to levels that have been exceeded on only a few occasions since 2008. Markets have now settled down somewhat, but it is far from clear whether the episode is over. In order to reach a judgment on this, we need to form a view on what caused the crisis in the first place.
The obvious answer is “China”. The response of the Chinese authorities to the stock market bubble, and the manner in which the devaluation of the renminbi was handled, raised questions about policy credibility that added to ongoing concerns about hard landing risk in the economy. The conclusion that a China demand shock was the main driving force behind the global financial turbulence was given added credence by the simultaneous collapse in commodity prices, and in exports from many emerging economies linked to China.
It would be absurd to deny that China had an important role in the crisis of August 2015. But was it the only factor involved? After all, China’s growth rate does not seem to have slowed very much. Furthermore, standard econometric simulations of the impact of a China demand shock on the major developed economies suggest that the effects should not be very large, and certainly not large enough to explain the scale of the decline in global equity prices, or in the “break-even” inflation rates built into US and European bond markets.
It is conceivable that bad news from China triggered a sudden rise in risk aversion among global investors that exacerbated the shock itself. It also possible that markets were responding to the fact that the Federal Reserve apparently remained determined to raise US interest rates before year end, regardless of the new deflationary forces that were being triggered by events in China.
New econometric work published today by my colleagues at Fulcrum suggest that the perception of an adverse monetary policy shock may have been important in explaining the financial turbulence, in which case the Fed needs to tread extremely carefully as it approaches lift-off for US rates. Read more