QQQ's conversion to an open-end fund closes a structural anachronism that the ETF industry had tolerated for decades

QQQ was born in 1999 as a unit investment trust, a legal wrapper that was standard for the earliest generation of ETFs but that the industry largely abandoned as the open-end fund structure proved more flexible. For over two decades, the fund kept its original jacket. That changed on December 19, 2025, when shareholders voted to approve conversion to an open-end fund ETF structure, with the fund beginning to trade under the new structure on December 22, 2025. The vote was confirmed by a Invesco press release carried by PRNewswire, and subsequently reported by Morningstar, Pensions and Investments, and The Daily Upside, with corresponding SEC filings on record.

Eric Balchunas, who tracks ETF structure and flows closely, put it plainly: “Invesco had a vote that turned it into an open-end fund.” That compression is accurate. The mechanism was a shareholder vote, which is the correct path for this kind of structural modification, and the outcome was definitive.

The practical significance is not trivial. Unit investment trusts carry structural constraints that open-end funds do not. A UIT cannot reinvest dividends from underlying holdings during the period before those dividends are distributed to shareholders, which creates a cash drag relative to funds that can put dividend income back to work immediately. UITs also cannot participate in securities lending, which is a meaningful revenue source for large open-end ETFs. QQQ, tracking the Nasdaq-100 and managing hundreds of billions in assets, leaves real money on the table under the old structure.

Invesco had a vote that turned it into an open-end fund. Eric Balchunas

The conversion does not change the fund’s index, its ticker, or its expense ratio in isolation. What it changes is the operational machinery underneath. Open-end fund status allows Invesco to reinvest dividends, to engage in securities lending if it chooses, and to manage the portfolio with the same toolkit available to every major competitor. Given QQQ’s scale, even a modest improvement in dividend drag or securities lending revenue compounds into a material figure over time.

There is also a competitive context worth noting. The two other original UIT-structured ETFs from the same era, SPY and DIA, have watched open-end competitors eat into their structural advantages for years. SPY in particular has faced sustained pressure from IVV and VOO, which are open-end funds tracking the same index at lower cost and without the dividend-drag problem. QQQ has not faced a direct equivalent threat at its scale, but the conversion removes the structural argument before it becomes one.

For shareholders who voted, the decision was framed as modernization. That framing is defensible. The UIT structure was not designed for a fund that would grow to its current size and prominence. Holding it in place was a function of the legal complexity involved in conversion, not an endorsement of the structure’s merits. The shareholder vote cleared that complexity.

What follows from here is operational. Invesco now has the tools available to other large ETF managers. Whether it uses securities lending revenue to trim costs, how it handles dividend reinvestment going forward, and how it positions QQQ against any future Nasdaq-100 competition are separate questions. The conversion itself is the predicate. The decisions built on top of it will take longer to observe and assess.