ProShares has filed its fourth MANGOS ETF in three days, with the product set to become effective on Aug. 31, 2026, underscoring how quickly issuers are moving to capture investor demand for AI-driven growth strategies. The burst of filings points to strong appetite for thematic funds tied to a narrow group of large technology companies associated with artificial intelligence, while also emphasizing the concentration risks that come with relying heavily on a small basket of stocks.