Best iShares ETFs

iShares is the ETF brand of BlackRock, the world's largest asset manager, and it is the largest ETF provider by assets under management. It offers hundreds of funds, from broad index building blocks to narrow sector and country bets. The part that matters most for a long-term portfolio is the iShares Core lineup: a deliberately small set of low-cost, broad funds meant to be portfolio foundations. IVV (S&P 500), ITOT (total US market), IXUS, IEFA and IEMG (international), and AGG (total bond) all sit at the cheap end, most around 0.03% to 0.09%.

One thing to be honest about up front: for the big categories, iShares is not uniquely “the best.” The S&P 500 fund from iShares (IVV), Vanguard (VOO), and SPDR (SPY) tracks the same index; the total-market and total-bond Core funds have near-identical Vanguard and Schwab versions (ITOT is like VTI and SCHB, AGG like BND and SCHZ). The cost gaps are tiny. So the real question this guide answers is not whether iShares wins, but which iShares fund fits each job if you have chosen to build inside the iShares family. For the cross-provider view, see our best ETF in every category and best Vanguard ETFs guides.

The US core is the foundation most portfolios are built around, and iShares offers two. IVV (iShares Core S&P 500) holds the roughly 500 largest US companies at around 0.03%, and is one of the largest ETFs in the world. ITOT (iShares Core S&P Total US Stock Market) holds several thousand stocks, adding the mid- and small-cap tail that the S&P 500 leaves out, at the same approximately 0.03%. IVV and ITOT overlap almost completely at the top because large-caps dominate both, so most people pick one rather than holding both.

The choice between them is small. ITOT is slightly more diversified; IVV stays pure large-cap. If you want the broadest single US fund, ITOT is the wider net; if you want the headline S&P 500 exactly, IVV is the cleaner fit. These are the direct iShares analogs of Vanguard's VOO and VTI and Schwab's SCHX and SCHB, and they track and cost nearly the same. For how the core fits a long horizon, our best S&P 500 ETFs guide compares IVV against the other large S&P 500 funds.

A US-only core leaves out roughly 40% of the world's market, and iShares covers the rest with three Core funds. IXUS (iShares Core MSCI Total International Stock) holds the entire non-US market, developed and emerging, in one ticker at around 0.07%. If you want to control the split, IEFA (iShares Core MSCI EAFE) covers developed markets only and IEMG (iShares Core MSCI Emerging Markets) covers emerging markets only, so you can weight Europe and Japan separately from China, India, and Taiwan. People use international funds to diversify away from a single country's market, accepting currency and country risk in exchange.

The Core international funds replaced the role of the older, pricier EFA and EEM (covered below) at a fraction of the cost. IEFA is near-identical to Vanguard's VEA, and IEMG is near-identical to VWO apart from IEMG including South Korea. For the emerging-markets breakdown specifically, see our best emerging market ETFs guide.

Bond funds are commonly used to lower a portfolio's overall volatility rather than to maximize return, and iShares spans the full range. AGG (iShares Core US Aggregate Bond) holds the total US investment-grade bond market, a mix of Treasuries, agency, and corporate bonds, at around 0.03%, the broad default. GOVT (iShares US Treasury Bond) holds US Treasuries across maturities only, stripping out corporate credit risk. TLT (iShares 20+ Year Treasury Bond) concentrates on long-dated Treasuries, which makes it far more sensitive to interest-rate moves, up sharply when rates fall and down sharply when they rise.

The amount and type of bonds people hold tends to track time horizon and risk tolerance: more, and shorter, for those closer to needing the money, with TLT a more specialized, higher-volatility instrument used to bet on rates rather than as a steady core. Like the equity categories, AGG is near-identical to Vanguard's BND and Schwab's SCHZ, so the broad-bond choice is mostly ecosystem and cost rather than performance.

Beyond the broad core, iShares offers income tilts and some of the most-traded sector funds. On dividends, DGRO (iShares Core Dividend Growth) holds US companies with records of raising payouts, favoring dividend growth and quality, at around 0.08%, while HDV (iShares Core High Dividend) screens for higher current yield. DGRO leans toward steadier, rising income; HDV pays more today. Both tilt away from the zero-dividend mega-cap technology names that dominate a broad core.

On sectors, three iShares funds are widely held thematic bets, all costing far more than the Core lineup at around 0.35% to 0.41%. IGV (iShares Expanded Tech-Software Sector) concentrates in software and cloud companies. ITA (iShares US Aerospace & Defense) holds the major defense and aerospace contractors. SOXX (iShares Semiconductor) holds the chipmakers behind computing and AI. These are concentrated tilts layered on a core, not replacements for it, and they carry sector-specific risk a broad fund spreads out. For small-cap exposure, iShares also runs IWM (Russell 2000) and IJR (S&P SmallCap 600), two different small-cap indexes with the same broad goal.

A useful distinction inside the iShares lineup is between the cheap Core funds and the older, pricier funds they were built to undercut. IEFA (around 0.07%) covers nearly the same developed-international market as the older EFA (around 0.33%); IEMG (around 0.09%) covers nearly the same emerging markets as the older EEM (around 0.70%). The Core versions hold very similar portfolios for a fraction of the fee, which is why they have grown so much larger. If you are choosing between EFA and IEFA, or EEM and IEMG, the Core version is the cheaper route to nearly the same exposure.

Against Vanguard, the comparison is closer still: IVV and VOO both track the S&P 500 at around 0.03%, ITOT and VTI both hold the total US market, IEMG and VWO both hold emerging markets, and AGG and BND both hold the total US bond market. The iShares Core funds and their Vanguard counterparts are near-identical and very cheap, so for these big slots the brand decides far less than the job. iShares can be the more convenient family if your broker already centers on it; the funds themselves are close substitutes.

Costs are approximate expense ratios as of early 2026; verify the current figure on the iShares site. The column to focus on is the middle one: the table is organized by the job each fund does, because for the big categories the iShares Core fund and its Vanguard or Schwab equivalent are nearly the same product. Pick the job first, then the fund.

Narrowing the iShares lineup to the fund for each job is the easy part. The harder step is deciding which ones fit together given what you already own, because stacking IVV, IGV, and SOXX, for example, mostly triples the same big technology names rather than diversifying. That is the part an AI assistant can actually help with, because it can reason over your real holdings rather than a generic list. The useful questions are specific: does this iShares fund overlap with what I already hold, does it fill the slot I am trying to fill, and how has it done against the S&P 500.

That is where Walnut fits. It connects your existing brokerage through SnapTrade and lets you ask, in plain language through Claude, ChatGPT, or a built-in assistant, which iShares ETF fits a given role, how much a new fund overlaps with what you already own, and how each position is doing against the market. It is read-only by default, and you approve any trade. Walnut is not an investment adviser; it helps you see and act on your own portfolio rather than telling you what to buy.

The point of looking at the best iShares ETF by job is to stop hunting for one winner and start filling a few clear slots. For a US core, IVV or ITOT; abroad, IEFA, IEMG, or IXUS; for bonds, AGG, GOVT, or TLT; for income, DGRO or HDV; for small caps, IWM or IJR; for sectors, IGV, ITA, or SOXX. The honest framing matters: for the big categories the cheap iShares Core funds are near-identical to the Vanguard and Schwab equivalents, so “best iShares ETF” is really the iShares fund for each job, and the job decides far more than the brand.

From a connected account you can dig into any of these as an ETF, look at an individual stock one of them holds, or explore a theme you want exposure to. Holdings, weights, and fees change over time; treat the specifics here as a starting point and confirm on the iShares site before deciding.