BCI vs COMT ETF comparison
BCI vs COMT
BCI holds futures on the 24 commodities of the Bloomberg Commodity Index, and COMT holds S&P GSCI futures chosen for the best roll yield, plus cash and short-term notes. The two funds follow different indexes. The Bloomberg Commodity Index Total Return caps any one commodity or sector so oil cannot dominate, which gives it more gold and farm products than a production-weighted index.
The S&P GSCI Dynamic Roll Index follows the S&P GSCI but chooses which contract month to hold using roll yield, so it holds the GSCI mix with a different roll rule. BCI charges 0.26% and COMT charges 0.48%. This page lines up what each fund holds by commodity, how much they overlap, what each paid and how each performed, with the date next to every number.
BCI vs COMT, the short answer
BCI and COMT differ in what they hold and what they charge. The two funds follow different indexes. The Bloomberg Commodity Index Total Return caps any one commodity or sector so oil cannot dominate, which gives it more gold and farm products than a production-weighted index.
The S&P GSCI Dynamic Roll Index follows the S&P GSCI but chooses which contract month to hold using roll yield, so it holds the GSCI mix with a different roll rule. Expense ratios are 0.26% and 0.48%. NAV total returns, annualized (both to Sep 30, 2026): 1 year 39.78% vs 48.38%; 3 years 15.15% vs 14.56%; 5 years 10.63% vs 13.55%. Neither is better for everyone; the choice turns on cost, tax form (K-1 or 1099), and what you already own.
BCI vs COMT overlap, if you own both
BCI · ten largest holdings
As of Oct 31, 2026 sectors- 1Gold GC11.05%Both
- 2Brent crude CO11.05%Both
- 3Natural gas NG9.51%Only here
- 4WTI crude CL8.78%Both
- 5Copper HG5.58%Both
- 6Corn C5.30%Both
- 7Soybeans S5.14%Only here
- 8Gasoil QS3.82%Both
- 9Aluminum LA3.48%Both
- 10Silver SI2.93%Only here
Ten largest total 66.6%
COMT · ten largest holdings
As of Nov 9, 2026- 1Brent crude CO19.07%Both
- 2WTI crude CL18.07%Both
- 3Gold GC7.92%Both
- 4Gasoil QS7.90%Both
- 5Copper HG6.47%Both
- 6Heating oil HO5.38%Only here
- 7Live cattle LC4.47%Only here
- 8Aluminum LA4.00%Both
- 9Corn C3.98%Both
- 10Gasoline XB3.38%Only here
Ten largest total 80.6%
Shared by both · 7 commodities
| Commodity | BCI weight | COMT weight | Gap |
|---|---|---|---|
| Gold GC | 11.05% | 7.92% | +3.13 pts |
| Brent crude CO | 11.05% | 19.07% | -8.02 pts |
| WTI crude CL | 8.78% | 18.07% | -9.29 pts |
| Copper HG | 5.58% | 6.47% | -0.89 pts |
| Corn C | 5.30% | 3.98% | +1.32 pts |
| Gasoil QS | 3.82% | 7.90% | -4.08 pts |
| Aluminum LA | 3.48% | 4.00% | -0.52 pts |
Only in BCI’s top ten: Natural gas, Soybeans, Silver. Only in COMT’s top ten: Heating oil, Live cattle, Gasoline.
The twist
69.8% of the exposure sits in commodities both funds hold (matched by commodity, issuer holdings dated Oct 31, 2026 sectors and Nov 9, 2026), and 7 commodities appear in both top-ten lists. Holding both repeats more than half of the same exposure, so the second fund mostly adds weight to what you already own.
BCI vs COMT, one goal, which fund?
BCI vs COMT, where the money goes
BCI · abrdn, Oct 31, 2026 sectors
COMT · BlackRock (iShares), Nov 9, 2026
BCI vs COMT returns compared over 1, 3, 5 and 10 years
BCI vs COMT, what each fund costs a year
The data room
Every figure behind the BCI vs COMT cards above, with its source, date and evidence grade. Open the issuer documents before relying on any number.
BCI vs COMT key facts
Evidence grade: Issuer issuer page · Mixed issuer plus provider · 3rd party| Metric | BCI | COMT | Grade and source |
|---|
Portfolio characteristics
| Metric | BCI | COMT | Grade and source |
|---|
Net assets are dated Nov 9, 2026 for both funds (BCI $3.28B; COMT $1.29B). Figures that the issuers do not publish, such as beta, standard deviation and 52-week range, are left as Not captured rather than estimated.
BCI vs COMT holdings and top ten
Click a commodity tile · BCI: abrdn, Oct 31, 2026 sectors · COMT: BlackRock (iShares), Nov 9, 2026Tile area is proportional to weight.
| # | Commodity | Weight |
|---|
| # | Commodity | Weight |
|---|
Top ten sums: BCI 66.6% · COMT 80.6%. 7 shared top-ten commodities. Weights change.
BCI vs COMT sector exposure
BCI: Oct 31, 2026 sectors · COMT: Nov 9, 2026The sector mirror
Same funds, different lenses
Contracts and collateral
Both funds hold futures contracts, not physical commodities. BCI lists 25 commodities and COMT lists 24. Each contract expires and is replaced (rolled) before it ends, and the cash backing the contracts sits in Treasury bills, money market funds and similar holdings. That collateral earns interest and is not counted in the commodity weights here.
What you actually own
BCI vs COMT performance
Matched dates, both to Sep 30, 2026; issuer NAV rows dated separatelyAll rows come from the issuer pages and are dated Sep 30, 2026 for both funds, so they compare like for like. NAV returns include fees; market price and benchmark returns are shown beside them where the issuer published them, and gaps are marked Not captured. “Since inception” starts in different years (BCI 2017, COMT 2014). Past performance does not guarantee future results.
Growth of a hypothetical $10,000 · NAV total return, both to Sep 30, 2026
Both funds derived from issuer NAV total returns on matched dates (compounded). Distributions reinvested; fund expenses are already in NAV. Illustration, not a forecast.
BCI vs COMT yield, dividends and dividend growth
Yield and distribution facts| Measure | BCI | COMT |
|---|---|---|
| 30-day SEC yield | Not reported | Not reported |
| Trailing 12-month | Not captured | Not captured |
| Paid, last 12 months | Not captured | Not captured |
| Frequency | Not captured | Annual |
Distribution frequency: BCI not captured, COMT annual. Per-share payouts differ because share prices differ, so compare yields rather than dollars. Payouts depend on Treasury interest earned on collateral and on how each fund is structured, and some payouts are classed as return of capital. Payouts captured: BCI 0, COMT 0; gaps are marked Not captured. See what is dividend yield and yield vs total return.
BCI vs COMT concentration and overlap
Ten largest positions · shared holdingsRank by rank, the ten largest commodities of each fund, as a share of futures exposure. Top five: BCI 46.0%, COMT 59.4%. Top ten: BCI 66.6%, COMT 80.6%.
BCI vs COMT trading and liquidity
Issuer fund pages · Nov 9, 2026The issuers report bid/ask spreads of 0.04% for BCI and 0.25% for COMT (measures differ by issuer; see each fund page). A spread of 0.05% is about $50 between the buy and sell price on $100,000, so check the live quote before you trade.
Commodity prices can swing sharply when oil or metals move, so spreads can widen on volatile days. Use limit orders for large trades and avoid the first and last minutes of the session. See creation, redemption and trading for how NAV, premiums and spreads arise.
BCI vs COMT expense ratio and fees in dollars
As stated by each issuer| Balance | BCI (0.26%) | COMT (0.48%) | Gap per year |
|---|---|---|---|
| $10,000 | $26 | $48 | $22 |
| $50,000 | $130 | $240 | $110 |
| $100,000 | $260 | $480 | $220 |
Expense ratio is taken from fund assets, not billed. Net expense ratios are shown (BCI: total 0.26%; COMT: gross 0.49%, net 0.48% after a 0.01% waiver). Fees exclude the bid/ask spread, any premium or discount to NAV, brokerage commissions and taxes.
BCI vs COMT, how each fund gets its commodity exposure
Index approach, in plain languageBCI · Bloomberg Commodity Index Total Return
BCI tracks the Bloomberg Commodity Index Total Return. It holds futures on about 25 commodities and was launched in 2017; the ten largest commodities total 66.6% of futures exposure. Index rules and rebalance dates are in the fund’s prospectus.
COMT · S&P GSCI Dynamic Roll Index
COMT tracks the S&P GSCI Dynamic Roll Index. It holds futures on about 24 commodities and was launched in 2014; the ten largest commodities total 80.6% of futures exposure. Index rules and rebalance dates are in the fund’s prospectus.
Exact eligibility rules, caps and rebalance dates sit in each prospectus and index methodology; read them before relying on this summary.
BCI vs COMT, why yield and returns differ
Sector mix explains much of the gapThe two funds follow different indexes. The Bloomberg Commodity Index Total Return caps any one commodity or sector so oil cannot dominate, which gives it more gold and farm products than a production-weighted index. The S&P GSCI Dynamic Roll Index follows the S&P GSCI but chooses which contract month to hold using roll yield, so it holds the GSCI mix with a different roll rule.
BCI follows the Bloomberg Commodity Index Total Return and COMT uses the S&P GSCI Dynamic Roll Index. Because commodity funds hold futures, the return comes from three sources: the change in commodity prices, the roll yield or cost as contracts are replaced, and interest earned on the collateral. Differences in contract choice, roll timing and collateral income explain most of the gap between funds with similar baskets, and fees explain the rest.
How to decide between BCI and COMT
A step-by-step frameworkStart with what separates them: The two funds follow different indexes. The Bloomberg Commodity Index Total Return caps any one commodity or sector so oil cannot dominate, which gives it more gold and farm products than a production-weighted index.
The S&P GSCI Dynamic Roll Index follows the S&P GSCI but chooses which contract month to hold using roll yield, so it holds the GSCI mix with a different roll rule. Then check what you already own: the funds overlap by 69.8%, so holding both is a real decision about how much of each market you want.
- Step 1 · Structure: BCI holds futures on the 24 commodities of the Bloomberg Commodity Index; COMT holds S&P GSCI futures chosen for the best roll yield, plus cash and short-term notes.
- Step 2 · Cost: BCI 0.26% vs COMT 0.48% net expense ratio.
- Step 3 · Tax form: BCI issues a 1099; COMT issues a 1099. This matters most for tax-advanced accounts and for Canadian investors.
- Step 4 · Overlap: use the Diversification Calculator against what you own.
Size the position against your whole portfolio. Commodity funds are volatile and behave differently from stocks and bonds, so they usually play a small, deliberate role.
BCI vs COMT for Canadian investors
Currency, withholding tax and account typeBCI and COMT are U.S.-listed and trade in U.S. dollars, so buying them from a Canadian account usually involves converting Canadian dollars, which adds a cost on both entry and exit. A move in the U.S. dollar also changes your return in Canadian dollars.
Tax treatment depends on the structure. A fund that files a Schedule K-1 can create extra reporting for a Canadian holder and may not suit an RRSP or TFSA, while a fund that issues a 1099 is simpler. Confirm the rules for your account with a tax professional. This is general education, not tax advice.
Risks of BCI and COMT
What can go wrongShared risks
- Commodity prices can swing sharply: oil, metals and crops respond to supply shocks, weather, politics and demand, and a broad commodity fund can fall while stocks rise.
- Futures funds can lose value when the market is in contango, because rolling into a more expensive contract costs money even if the spot price does not change.
- Energy is 39% of BCI and 56% of COMT, so oil and fuel prices drive a large share of the result.
- Commodities produce no earnings or dividends of their own; returns come from price changes, roll yield and interest on collateral.
Fund-specific risks
- BCI: ten largest commodities total 66.6% of futures exposure (Oct 31, 2026 sectors); exposure to 25 commodities.
- COMT: ten largest commodities total 80.6% of futures exposure (Nov 9, 2026); exposure to 24 commodities.
- BCI: uses Bloomberg index weights with a K-1 free structure; abrdn publishes sector weights only. COMT: follows the GSCI with a dynamic roll rule, and its roll choice can differ from the index in a given month.
- Both: not registered as ordinary stock funds; see each prospectus for legal form and the risks of futures.
BCI vs COMT taxes and account placement
General education, not tax adviceBCI is marketed as K-1 free and issues a standard 1099, but income from its holdings can be taxed as ordinary income. COMT is a regulated fund that issues a standard 1099 rather than a Schedule K-1, but income from its futures and cash holdings can be taxed as ordinary income. Issuer pages list after-tax returns only for some funds, and gaps are marked Not captured.
For Canadian account types and withholding tax, see the Canadian section above. Confirm the rules for your account with a tax professional, and read how to build an ETF portfolio.
Other ETFs people compare
For context, not recommendationsInvestors comparing BCI and COMT often also look at the other broad commodity funds in this group: DBC, PDBC, GSG, USCI, BCI and COMT. See the other commodity ETFs comparisons and the ETF research hub.
BCI vs COMT drawdown arithmetic
What a decline means in dollarsRecovery gain = decline ÷ (1 − decline). The scenarios use illustrative declines of 10%, 20% and 30% so you can see what a drop does to each fund. They are a rough guide to a bad year, not a worst-case figure. See the Position Size Calculator.
Tools to compare BCI vs COMT
Static weights from this pageIgnores taxes, spreads and holdings differences. ETF Fee Calculator.
Check shared exposure with the Diversification Calculator.
BCI vs COMT, which fits which job
Characteristics, not recommendationsBCI may suit investors who want…
Capped, balanced commodity exposure with more gold and farm products.
Strengths
- Lower fee: 0.26% against 0.48%
- Futures on 25 commodities
- Flatter top ten: 66.6% against 80.6%
- Exchange-traded and priced all day
Watch points
- Led in only 1 of 3 return windows (both to Sep 30, 2026)
- Not a complete portfolio
- Futures roll costs
COMT may suit investors who want…
GSCI exposure with a roll-yield rule.
Strengths
- Futures on 24 commodities
- Led in 2 of 3 return windows (both to Sep 30, 2026)
- Exchange-traded and priced all day
- Holdings dated on this page
Watch points
- Higher fee: 0.48% against 0.26%
- Heavier top ten: 80.6% against 66.6%
- Not a complete portfolio
- Futures roll costs
BCI vs COMT investor scenarios
Characteristics that fit, not recommendationsBCI vs COMT key terms
Plain-language definitions
BCI vs COMT, frequently asked questions
Answers use the figures and dates shown aboveIs BCI or COMT better?
In the BCI vs COMT question, neither is better for everyone. BCI and COMT differ in what they hold and what they charge. The two funds follow different indexes. The Bloomberg Commodity Index Total Return caps any one commodity or sector so oil cannot dominate, which gives it more gold and farm products than a production-weighted index.
The S&P GSCI Dynamic Roll Index follows the S&P GSCI but chooses which contract month to hold using roll yield, so it holds the GSCI mix with a different roll rule. Expense ratios are 0.26% and 0.48%. NAV total returns, annualized (both to Sep 30, 2026): 1 year 39.78% vs 48.38%; 3 years 15.15% vs 14.56%; 5 years 10.63% vs 13.55%. Neither is better for everyone; the choice turns on cost, tax form (K-1 or 1099), and what you already own.
BCI vs COMT, what are the expense ratios?
BCI charges 0.26% and COMT charges 0.48%, which is $26 and $48 a year per $10,000.
BCI vs COMT, how much do the funds overlap?
About 69.8% of the exposure is held by both funds, matched by commodity in issuer holdings dated Oct 31, 2026 sectors and Nov 9, 2026. 7 commodities appear in both top-ten lists.
BCI vs COMT, what does each ETF track?
BCI tracks the Bloomberg Commodity Index Total Return. COMT tracks the S&P GSCI Dynamic Roll Index.
BCI vs COMT, what are the top commodities?
BCI (Oct 31, 2026 sectors): Gold 11.05%, Brent crude 11.05%, Natural gas 9.51%, WTI crude 8.78%, Copper 5.58%. COMT (Nov 9, 2026): Brent crude 19.07%, WTI crude 18.07%, Gold 7.92%, Gasoil 7.9%, Copper 6.47%.
BCI vs COMT, which has performed better?
NAV total returns, annualized (both to Sep 30, 2026): 1 year 39.78% vs 48.38%; 3 years 15.15% vs 14.56%; 5 years 10.63% vs 13.55%. Returns depend on commodity prices, roll yield and collateral income, and past performance does not guarantee future results.
BCI vs COMT, can I own both?
On BCI vs COMT, you can, but they overlap by about 69.8%. 7 top-ten commodities are shared. Holding both repeats more than half of the same exposure, so the second fund mostly adds weight to what you already own.
BCI vs COMT, how often do the funds pay dividends?
Distribution frequency: BCI not captured, COMT annual. Distribution rates are not captured for BCI and 1.61% for COMT; check each issuer page for the schedule.
BCI vs COMT, are they suitable for Canadian investors?
On BCI vs COMT, both are U.S.-listed and trade in U.S. dollars, so Canadians face currency conversion costs. BCI issues a 1099 and COMT issues a 1099, which can change reporting. Treatment differs across TFSA, RRSP and taxable accounts. This is general education, not tax advice.
BCI vs COMT, how do the funds differ by sector?
BCI (Oct 31, 2026 sectors): energy 38.9%, agriculture 29.1%, precious metals 14.0%. COMT (Nov 9, 2026): energy 56.0%, agriculture 14.0%, industrial metals 12.7%.
BCI vs COMT documents and sources
Open the issuer documents before relying on any figureBCI · abrdn
COMT · BlackRock (iShares)
Third-party sources
abrdn BCI fund page · iShares COMT fund page.
Methodology and limits
- BCI figures come from abrdn fund pages and COMT figures from BlackRock (iShares) fund pages.
- Dates are shown beside each figure; the issuer documents are linked below.
- Overlap is the sum of the smaller weight of each commodity held by both funds. Treasury bills, cash and swaps used as collateral are excluded, and the dates and bases differ, so treat the overlap as an estimate. Weights are shares of each fund’s futures exposure by underlying commodity, so Treasury bills, cash and collateral are excluded. BCI publishes sector weights only (Oct 31, 2026), so Bloomberg Commodity Index 2026 target weights were rescaled to match abrdn’s sector weights. COMT weights are each commodity’s share of futures notional value in the iShares holdings file of Nov 9, 2026.
- This page shows livestock as its own group for every fund.
- Figures that were unavailable (beta, standard deviation, 52-week range, calendar-year returns) are left as Not captured, and nothing was filled from memory or from another fund.
- Growth of $10,000 is derived from annualized NAV total returns on matched dates; dollar values are approximate.
- Returns are issuer-reported NAV total returns (dates shown beside each figure), with market price and benchmark figures where published.
Educational research, not personalized investment, tax or legal advice, and not a recommendation to buy or sell any fund. Investing involves risk, including loss of principal. Past performance does not guarantee future results. Calculators are hypothetical illustrations. Fund data are provided as published by the sources named and may differ from current figures.