Currency-hedged equity strategies have become increasingly popular in the exchange-traded fund (ETF) investment scene, and it started with the significant weakening of the yen, which led to a wide disparity in performance between unhedged and currency-hedged Japanese ETFs.

A key driver in the case of Japan was negative correlation, or an inverse relationship, between the performance of Japanese stocks and the yen. As the yen weakened, Japanese stocks performed well.

There is recent evidence that Europe is becoming more Japan-like in displaying negative correlations between its equity markets and its currency moves. This negative correlation in Europe is not a new phenomenon: Much of the 1990s into the mid-2000s was characterized by a persistent negative correlation between the trade-weighted euro and the respective European stocks. The return of these stronger negative correlations is why I say the euro is increasingly the new yen.

Negative Correlations: A Historic Look Back

Over the years, the Japanese yen has become increasingly negatively correlated to equities. While beginning in the ’70s there was a run of approximately 25 years of positive correlation, 1995 marked a new regime. The new regime of negative yen and equity correlations in Japan coincided with a period of slow growth, deflation and zero-bound policy rates by the Bank of Japan (BOJ); this negative correlation has been prevalent ever since.

In many ways, this macroeconomic backdrop is similar to that of the eurozone; since the beginning of 2014, both the euro and local equities have started to show increasingly negative correlation. What may be surprising is how often this was the case during the ’90s—and how Europe has historically been more “Japan-like” in its negative correlation between equity markets and the European currencies.

Recent Negative Correlation between Euro Currency and Equities Reminiscent of Japan

Why Have Correlations Turned Negative and Japan-Like? Is This a Replay of the ’90s?

As the above chart shows, there was a nine-year stretch between September 1, 1992, and May 31, 2001, when European currencies in the MSCI EMU Index (EMU) depreciated 40.2% cumulatively versus the U.S. dollar, and EMU stocks in local currency terms had one of their best stretches ever, returning 19.8% per year. On a trade-weighted basis, European currencies declined 27.9% during the same period. This period alone suggests the European markets can perform well when the euro declines.

Per the charts above, in the 1,252 rolling 52-week periods examined from January 1991 through December 2014, the Euro Stoxx 50 had a negative correlation to the European currencies, measured on a trade-weighted index, 60% of the time. The Nikkei 225 Index had a negative correlation to the yen only 57% of the time, albeit with very highly negative correlations that began showing up in late 2007.

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