AIO vs BLK: Which Is the Better Buy in 2026?

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. AIO and BLK share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined AIO and BLK exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

The Virtus Artificial Intelligence & Technology Opportunities Fund (AIO) is a closed-end fund, not an operating company. A closed-end fund raises a fixed pool of capital, invests it, and then trades on an exchange like a stock, which means its share price is set by supply and demand and can sit above (a premium) or below (a discount) the net asset value of the securities it holds. AIO is managed by Virtus Investment Advisers and sub-advised by Voya Investment Management, whose team runs a multi-asset strategy focused on companies exposed to artificial intelligence and other disruptive technologies. Rather than holding equities alone, the fund dynamically allocates across a company's capital structure, pairing common stocks with convertible securities that can offer some downside cushion and income.

Full AIO guide

BlackRock is a New York-based investment manager that oversees money for institutions, governments, and individuals worldwide. Its franchises span index funds and iShares ETFs, active equity and fixed income, cash management, and a rapidly expanding private-markets arm built through the 2024-2025 acquisitions of Global Infrastructure Partners, HPS Investment Partners, and the private-markets data provider Preqin. The Aladdin platform, which powers risk and portfolio management for BlackRock and outside clients, anchors a technology-services business that reached roughly $2 billion in annual revenue.

Full BLK guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• AIO drivers: Concentrated AI and technology exposure; Managed monthly distribution policy.
• BLK drivers: Record scale and inflows; Private markets build-out.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: AIO carries several fund-specific risks. For BLK, blackRock's fee revenue is tied to market levels, so a sustained equity or bond drawdown would pressure assets under management and base fees.

Pick AIO if you believe its drivers more; BLK if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the AIO and BLK guides.

AIO. These figures are qualitative and change frequently. The distribution rate is a managed payout, not a yield earned on portfolio income, and it can include a return of capital, so it may overstate the income the underlying holdings generate. Premium and discount to NAV, the distribution rate, leverage, and expenses all move over time. Always verify the live NAV, current discount or premium, and the latest distribution details on the fund's official page or a closed-end fund data source before investing.

BLK. BlackRock trades at a premium to smaller asset managers, reflecting its scale, technology revenue, and private-markets expansion. Base fees move with assets under management, so quarterly results track market levels and net flows. The next earnings report is scheduled for July 21, 2026.

Headline figures (approximate, Jul 2026): AIO shows distribution rate Pays a managed monthly distribution; the fund raised its monthly payout in mid-2026 and quotes a per-annum rate on both market price and NAV. Treat this as a distribution rate, not a yield on earnings, and confirm the live figure., premium / discount to nav Has generally traded at a discount to net asset value during 2026, though this fluctuates and can move to a premium. Check the current discount before buying., leverage Uses modest leverage (borrowing to invest beyond base assets) to enhance income and return, which magnifies gains and losses and adds interest cost., expense ratio Higher than a typical index ETF, in part because of interest expense on leverage; the ratio is meaningfully lower when borrowing costs are excluded.; BLK shows assets under management ~$13.9 trillion, revenue (ttm) ~$25.6 billion, q1 2026 revenue ~$6.7 billion (up ~27% YoY), market cap ~$160 billion.

AIO and BLK are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined AIO and BLK exposure against your real portfolio. It is not an investment adviser.