In trading on Tuesday, shares of the Chinese Yuan Dim Sum Bond Portfolio ETF ( DSUM) entered into oversold territory, changing hands as low as $25.051 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 Chinese Yuan Dim Sum Bond Portfolio, the RSI reading has hit 22.1 — by comparison, the RSI reading for the S&P 500 is currently 58.7. A bullish investor could look at DSUM's 22.1 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), DSUM's low point in its 52 week range is $23.73 per share, with $25.82 as the 52 week high point — that compares with a last trade of $25.06. Chinese Yuan Dim Sum Bond Portfolio shares are currently trading down about 0.8% on the day.