In trading on Monday, shares of the Financial Preferred Portfolio ETF ( PGF) entered into oversold territory, changing hands as low as $17.24 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 Financial Preferred Portfolio, the RSI reading has hit 26.5 — by comparison, the RSI reading for the S&P 500 is currently 38.1. A bullish investor could look at PGF's 26.5 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), PGF's low point in its 52 week range is $17.24 per share, with $18.85 as the 52 week high point — that compares with a last trade of $17.42. Financial Preferred Portfolio shares are currently trading off about 1% on the day.