Why Falling Country Correlations Matter

September 25, 2017

This article is part of a regular series of thought leadership pieces from some of the more influential ETF strategists in the money management industry. Today's article is by James Calhoun, portfolio manager at Accuvest Global Advisors in Walnut Creek, California.

Over the last 24 months, the average correlation between single-country equity markets has dropped significantly. These dropping country correlations are also clearly visible at the regional level. As seen in the chart below, rolling one-year correlations between the S&P500, EuroStoxx 600, Nikkei 225 and MSCI Emerging Markets Index are making new post-2000 lows.

While inter-regional equity return correlations are almost always positive, how positive they are or aren’t affects how much value there is in regional and country level allocation decisions. Low country correlation is an investment opportunity for country selection.



Why Correlations Were So High

Mathematically, correlations across countries (or securities) increase when systematic risk increases, or idiosyncratic risk decreases. A systematic risk is felt throughout the system; it is a “shared” risk, a “common denominator.”

The 2007-2016 period of historically high correlations can be attributed to elevated systematic risk outweighing traditionally important country specific risk. Elevated systematic risk resulted in a “risk on/risk off” market environment where countries (regardless of risk, value or fundamentals) moved in unison.

Mapping systematic risk to the chart above, we postulate that the 2007-2012 period of elevated correlations can be attributed to global financial crisis (2008-2009) and subsequent “shared” uncertainty surrounding the interest-rate effects of quantitative easing starting with the U.S. in 2009, Bank of England in 2010 and Bank of Japan in 2010.

Country-Specific Risks Overshadowed

The drop in rolling one-year correlations during 2012 to 2013 can be mapped to the European debt crisis and U.S. “taper tantrum,” which had an acute impact on Europe and emerging markets, respectively.

Regional correlations began increasing again when ECB Chairman Mario Draghi reaffirmed the ECB’s willingness to “do whatever it takes” to save the euro, and the Fed used forward guidance to emphasize a more cautious “lower for longer” approach to its QE tapering.

With Draghi’s announcement, Europe joined the U.S. and Japan in synchronized quantitative easing, strengthening the “systematic” impact of low/negative interest rates on country correlations. This coordinated global central bank policy overwhelmed idiosyncratic country-specific risks.

Accordingly, countries with high risk, expensive valuations and weak fundamentals surged and dipped in unison with countries exhibiting low risk, stronger fundamentals and cheaper valuations—resulting in a period of historically high country correlation.


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