Small but mighty has never rung truer.
Small-cap stocks as tracked on the S&P Small Cap 600 outpaced the larger S&P 500
For the first time since December 2016, all 11 small-cap sectors posted gains last month. It's a quick turnaround from February, during which all 11 sectors were negative for the month. "This is only the ninth time in history since January 1995 that the small-cap sectors went from all losing to all winning in three months or less, and the last time it happened was in October 2015," S&P found.
Healthcare, information technology and real estate were May's sector leaders, up 9.3%, 7.9% and 7.9%, respectively.
According to S&P's Head of U.S. Equities Jodie Gunzberg, strength in healthcare small caps has been driven by "healthy deal making, increased expectations for acquisition of smaller companies and stronger innovation." Healthcare measured outperformance of small caps over large caps of about 9%, analysts found.
Consumer staples had almost as much of a small-cap premium as healthcare in May, up about 8.8% compared to larger firms. Gunzberg added that the current economic landscape is more favorable for small-cap consumer staples than it is large-cap ones. "Smaller consumer staples companies historically do better from GDP growth, gaining on average 5.9% per 1% of growth, as compared to the large caps that rise just 4%," S&P wrote.
Additionally, rising rates are more of a boon to small-cap consumer staples than large cap. "For every 100 basis point increase, small-cap consumer staples rose 7.2% on average historically, whereas the same rate hike has only pushed large-cap consumer staples companies up 4% on average," S&P said.