Below is a three month price history chart comparing the stock performance of CLR vs.

FORBES: Continental Resources Larger Than S&P 500 Component Progressive

Below is a three month price history chart comparing the stock performance of CLR, versus GTE and FST.

FORBES: Shares of CLR Now Overbought

Below is a three month price history chart comparing the stock performance of CLR, versus RRC and CXO.

FORBES: Bearish Two Hundred Day Moving Average Cross - CLR

Below is a three month price history chart comparing the stock performance of BP, versus CLR and ESV.

FORBES: BP Shares Enter Overbought Territory

Below is a three month price history chart comparing the stock performance of MVO, versus CLR and ESV.

FORBES: MVO Crosses Critical Technical Indicator

At the closing bell, CLR is off about 1.7%, while PGR is down about 1.3% on the day Wednesday.

FORBES: Continental Resources Larger Than S&P 500 Component Progressive

According to the ETF Finder at ETF Channel, CLR and PGR collectively make up 1.43% of the Guggenheim Raymond James SB-1 Equity ETF (RYJ) which is higher by about 1.6% on the day Wednesday.

FORBES: Continental Resources Larger Than S&P 500 Component Progressive

These include cancer and immune-inflammatory biotech drug company Celgene ( CELG), pharmacy benefits manager and health information systems supplier SXC Health Solutions ( SXCI), economic, financial, and political researcher IHS Inc ( IHS), and shale oil and gas producer Continental Resources ( CLR).

FORBES: Stock Picks For A New Trading Rally

Among the largest underlying components of XOP, in trading today Approach Resources Inc ( NASD: AREX) is up about 0.7%, Clayton Williams Energy, Inc. ( NASD: CWEI) is up about 0.8%, and Continental Resources Inc. ( NYSE: CLR) is lower by about 0.5%.

FORBES: SPDR S&P Oil & Gas Exploration & Production ETF Experiences Big Inflow