The relative performance has been highly correlated to the movement of the USD. US small caps made an intermediate high in April 2015 after the USD soared from about 80 to 100. They then tested this high in December 2016 as the USD once again reached new highs. Recently, as the USD was on the rise once again, small caps again tested their decade-long relative highs.
However, over the last few weeks, as the USD slowly rolled over, small caps are down about 3.5%.
When I tune the time-frame in to just this year’s, the relationship with the USD is even more clear. With an 83% correlation, roughly two-thirds of the performance of small caps this year can be attributed to the rise in the USD.
An interesting picture emerges when I compare US small caps to US mid/large cap stocks. All of the relative performance lead that US small caps have on mid/large caps was achieved from November 2008 through April 2011. For the most part, small caps have traded in a 15% band around mid/large caps for seven years. Small caps have actually been underperforming mid/large cap stocks for four years now, tracing out a sequence of lower highs (April 2015, December 2016 and July 2018).
Small caps have underperformed mid/large caps by about 5% since making a relative high June 21, 2018. There is support nearby, but if small caps underperform US mid/large caps by another 5%, then the technical picture could change for the worse.
The iShares Russell 2000 Index ETF (IWM) was unchanged in premarket trading Friday. Year-to-date, IWM has gained 10.47%, versus a 9.37% rise in the benchmark S&P 500 index during the same period.
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