SPY Crosses Critical Technical Indicator
August 21, 2015 at 16:27 PM EDT
In trading on Friday, shares of the SPDR S&P 500 ETF (SPY) entered into oversold territory, changing hands as low as $197.91 per share. We define oversold territory using the Relative Strength Index, or RSI, which is a technical analysis indicator used to measure momentum on a scale of zero to 100..