In trading on Friday, shares of the WisdomTree Barclays U.S. Aggregate Bond Negative Duration Fund ETF ( AGND) entered into oversold territory, changing hands as low as $45.21 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 WisdomTree Barclays U.S. Aggregate Bond Negative Duration Fund, the RSI reading has hit 27.8 — by comparison, the RSI reading for the S&P 500 is currently 45.8. A bullish investor could look at AGND's 27.8 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), AGND's low point in its 52 week range is $45.21 per share, with $50.17 as the 52 week high point — that compares with a last trade of $45.23. WisdomTree Barclays U.S. Aggregate Bond Negative Duration Fund shares are currently trading off about 0.7% on the day.