In trading on Monday, shares of the Guggenheim BulletShares 2016 High Yield Corporate Bond ETF ( BSJG) entered into oversold territory, changing hands as low as $26.46 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. A stock is considered to be oversold if the RSI reading falls below 30.In the case of Guggenheim BulletShares 2016 High Yield Corporate Bond, the RSI reading has hit 23.8 — by comparison, the RSI reading for the S&P 500 is currently 47.2. A bullish investor could look at BSJG's 23.8 reading as a sign that the recent heavy selling is in the process of exhausting itself, and begin to look for entry point opportunities on the buy side. Looking at a chart of one year performance (below), BSJG's low point in its 52 week range is $26.46 per share, with $28.37 as the 52 week high point — that compares with a last trade of $26.47. Guggenheim BulletShares 2016 High Yield Corporate Bond shares are currently trading down about 0.7% on the day.