Why the difference? Part of the reason is that the Invesco Momentum ETF is a long-only portfolio—it has no short bets that can go against it. The rest of the difference can be attributed to the timing and frequency of its rebalances: The Invesco Momentum ETF rebalanced only twice a year in March and last September, while the earlier-mentioned long-short strategy does it quarterly, the latest ones in February and last November.
Analysts usually upgrade their earnings estimates for high-momentum stocks more than low-momentum stocks, creating an overly bullish sentiment among investors that could often make the high-momentum stocks very crowded. That behavior has moderated over recent months, noted McCarthy, and the momentum strategy has become less crowded since the fourth quarter last year, though still above historical levels.
This section lists the number of stocks that have advanced and declined for the day with the volume of shares traded, as well as the number of new 52-week high and low stocks for each of the exchanges. The numbers include all active stocks for that day. For U.S. Markets, only NYSE and NASDAQ stocks are included, excluding ETF's. NYSE and NASDAQ stocks also exclude unit investment trusts, closed end funds, warrant stocks, preferred securities and any non-SIC classified stock. For Canadian Markets, only TSX and TSX-V stocks are included.