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During its latest rebalance, the Invesco S&P 500 Momentum ETF (SPMO) halved its exposure to the tech sector from 36.6% to 17.2%, and more than doubled the weight in health care to 27.9%. Utilities and real estate went from nearly zero to 11.7% and 7.1% of the portfolios, respectively. That helps explain the fund’s moderate loss of 1.7% in May, even though the tech stocks within the S&P 500 slumped a much steeper 5.7%.

Barchart calculates a custom index (the Barchart Market Momentum Index) which is used as an indicator of overall change in the markets. The index reflects the movement of more established stocks: those with SEC filings, with 6 months of trading activity, and with price above $2.00. A high value means the market is moving up, where as a negative value implies the market is down today.