According to @EricBalchunas, GDXU was the top-returning ETF of 2025 with an 830% gain (source: @EricBalchunas, Dec 31, 2025). According to @EricBalchunas, despite this performance, the fund showed zero inflows and zero outflows for the entire year (source: @EricBalchunas, Dec 31, 2025). According to @EricBalchunas, GDXU still averaged about $200 million in daily trading volume (source: @EricBalchunas, Dec 31, 2025). According to @EricBalchunas, the ETF appeared open to new creations, making the flat flows unusual and odd for traders monitoring primary market activity (source: @EricBalchunas, Dec 31, 2025).