Performance Update: Invesco S&P Midcap 400 Pure Value ETF Climbs Over 1% The Invesco S&P Midcap 400 Pure Value ETF (RFV) closed at $104.85, marking a 1.09% gain as of the latest session. The ETF, which tracks value-oriented midcap stocks, now boasts a market capitalization of $2.2 million and 2 million shares outstanding, signaling steady investor interest.34