Another bearish sign: the shorter-term, 50-day moving average of all three ETFs crossed below the 200-day at the start of this month.

另外一个疲软的信号显示，自本月起短期而言，50日均线的三个ETF均低于200天以来的水平。

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It measures prices compared with those in January 2000 and creates a three-month moving average.

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Its three-month moving average, considered a recession indicator, fell from -0.26 in July to -0.47 in August.

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Its closely watched three-month moving average is now at -0.4, just fractionally above the -0.7 level that has marked the beginning of all seven recessions that have taken place since 1970.

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