CGMM bid-ask spread and liquidity

Capital Group U.S. Small and Mid Cap ETF

StocksCapital Group$3.6bn net assets0.51% fee

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As of Oct 22, 2026, CGMM’s median bid-ask spread over 30 days was 0.03%.

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Answers cite the figures on this page.

Overview Holdings Dividends Trading Flows Compare

IQ Liquidity Score

2 of 6 measured · Oct 22, 2026

Not scored

0 · Hard to trade100 · Trades like a giant

The IQ Liquidity Score: a fixed 0 to 100 scale of trading conditions, the same anchors for every fund; 100 is the easiest to trade. It measures how cheaply and reliably the fund trades, not whether to own it. Method →

Cost to trade

0.03% median spread, 30 days to Oct 22, 2026

91.2

Capacity

Holdings can absorb up to $255m a day; part of the book has no volume figure

Price fidelity

Not measured · 5 days of closing premium are held, under the 20 needed

Primary market

14 active dealers of 23; largest 59% of creations and redemptions, N-CEN to May 31, 2026

100.0

Bad-day behaviour

Not measured · 0 of the 10 worst days and 5 other days are held, under the 5 and 60 needed

Depth

Not measured · needs trade and quote data (Phase 2)

Cost for your order

One way, half its 30-day median spread; sizes above $10,000 are estimates

CGMM: cost for your order at each size, round trip
Order	Dollars	Percent	Basis
$1,000	$0.15	0.015%	spread
$10,000	$1.50	0.015%	spread

Spread 0.03% median, 30 days to Oct 22, 2026. Above $10,000 the cost adds an estimate of market impact that grows with the order against the holdings’ capacity; a patient limit pays less.

Premium or discount to value

Daily, 5 days to Oct 22, 2026 · the ±1% band marked

Latest close, Oct 22

+0.03%

95% of days within

±0.13%

Days more than 1% from NAV

0 of 5

Widest

+0.13%, Oct 20, 2026

Close against the NAV its issuer struck the same day, from the issuer. Source: ETFIQ.

Capacity

What the holdings can absorb a day, at 10% of each one’s volume

Holdings can absorb, at most

$255m

CGMM’s holdings can absorb up to $255m a day, measured on its own holdings, as of Oct 22, 2026. Part of its book has no volume figure, so this is an upper bound.

The holding that sets the limit: Ingram Micro Holding Corp (INGM), 1.43% of the fund, $37m a day traded, the median of 20 days to Oct 22, 2026. Capacity is the least of the holding-level ratios over the holdings making up 95% of the weight.

Dealers

Authorized participants · N-CEN, the year to May 31, 2026

Active dealers

of 23 authorized

Largest

59%

of creations and redemptions

One dealer

14 active

14 of 23 authorized participants created or redeemed CGMM shares in the year to May 31, 2026. From the fund’s Form N-CEN, filed Aug 14, 2026.

The active authorized participants, largest first, by share of the dollars created and redeemed: Merrill Lynch Professional Clearing Corp. (58.6%), RBC Capital Markets, LLC (19.4%), Goldman Sachs & Co. LLC (5.8%), Jane Street Capital, LLC (3.0%), Macquarie Capital (USA) Inc. (2.5%), Virtu Americas LLC (2.1%), BMO Capital Markets Corp. (1.7%), Cowen Execution Services LLC (1.6%), J.P. Morgan Securities LLC (1.3%), Citigroup Global Markets Inc. (1.2%), Mizuho Securities USA LLC (1.2%), Wells Fargo Securities, LLC (0.7%), Jefferies LLC (0.6%), ABN AMRO Clearing USA LLC (0.2%). 9 more were listed and created or redeemed nothing.

How to trade CGMM

To buy or to sell, up to $100,000

Order type: Limit: midpoint + 1¢ to buy, midpoint − 1¢ to sell.At the Oct 22 close of $31.28, that’s $31.29 to buy and $31.27 to sell.
When: ETF spreads are usually widest in the first minutes after the open and the last before the close.
Size: Part of its book has no volume figure, so the room for a large order is an upper bound.
Watch: The premium. On 95% of days it is within ±0.13%; beyond that a buyer pays more, and a seller gets less, than the holdings are worth.

Phase 2 · drawn now, filled when trade data arrives

Spread through the dayComing with trade data

Median spread by half hour, 30 days.

Buyers against sellersComing with trade data

Share of volume at the ask against at the bid.

Retail flow, estimatedComing with trade data

Sub-penny prints as a share of volume.

Large tradesComing with trade data

Prints above $500k, count and share.

Closing auctionComing with trade data

Share of the day’s volume at the close.

Questions people ask

What is CGMM’s bid-ask spread?

0.03% of the midpoint, the median over the 30 days to Oct 22, 2026, as its issuer states it. Half of it is about 1¢ a share at the Oct 22 close.

Does CGMM trade at a premium or discount to NAV?

It closed +0.03% from its NAV on Oct 22, 2026. On 95% of the 5 days to then it was within ±0.13%, and it closed more than 1% from NAV on 0 of them.

Who is the AP for CGMM?

CGMM’s latest Form N-CEN, for the period ending May 31, 2026, lists 23 authorized participants (APs), and 14 created or redeemed shares. The largest were Merrill Lynch Professional Clearing Corp. (58.6%), RBC Capital Markets, LLC (19.4%), Goldman Sachs & Co. LLC (5.8%) of the dollars its APs created and redeemed.

Who is the LMM for CGMM?

CGMM’s lead market maker (LMM) on NYSE Arca is Citadel Securities LLC. Lead market maker per NYSE Arca, as of Oct 23, 2026.

What does it cost to trade $10,000 of CGMM?

About $1.50 one way, 0.015%: half its 30-day median spread. In and out costs twice that.

How do I place a limit order for CGMM?

Set the limit at the midpoint + 1¢ to buy, or the midpoint − 1¢ to sell, in your broker’s quote. At the Oct 22 close of $31.28, that’s $31.29 to buy and $31.27 to sell.

Sources and dates

SpreadCapital Group (fund page), 30-day median · to Oct 22, 2026

Premium to NAVETFIQ, close against the issuer’s NAV · Oct 16, 2026 to Oct 22, 2026

CapacityETFIQ, each holding’s 20-day median dollar volume · to Oct 22, 2026

DealersForm N-CEN · the year to May 31, 2026

Where to next

ETF trading costs and liquidity→Cost-to-trade checker→Why low volume does not mean illiquidguide →Limit orders vs market orders for ETFsguide →How the IQ Liquidity Score is builtmethod →CGMM fund page→

Cite this pageCitation, APA and Markdown

ETFIQ, CGMM trading: cost, capacity, premium and dealers, data as of Oct 22, 2026. https://etfiq.com/funds/cgmm/trading/

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The score measures trading conditions, not the fund. ETFIQ makes no recommendations.