IMCB vs VXF: Differences, Returns & Fees

IMCB and VXF hold 12% of their weight in the same names, and IMCB returned +19.2% over the year. Net assets: $1.7bn on Oct 20, 2026 for iShares Morningstar Mid-Cap ETF, and $30.2bn on Sep 30, 2026 for Vanguard Extended Market ETF.

Ask IQ about this page

Ask IQ about IMCB and VXF

Answers cite the figures on this page.

IMCB costs 0.01 points a year less; their one-year returns differ by 9.3 points; VXF is 18.3 times larger.

IMCB vs VXF: Differences, Returns & Fees
IMCBVXF
Expense ratio0.04%0.05%
Net assets, as of Sep 30, 2026$1.7bn$30.2bn
Total return, 1 year+19.2%+9.9%
What it tracksMorningstar US Mid Cap IndexS&P Completion Index
Holdings in common12%
Top ten holdings, share of the fund7.9%11.3%
Below its high3.3%, high on Aug 14, 20267.9%, high on Aug 14, 2026

Holdings in common uses holdings dated Sep 30, 2026 and Oct 19, 2026.

+19.2%
IMCB total return, 1 year
+9.9%
VXF total return, 1 year
0.04%
IMCB expense ratio
0.05%
VXF expense ratio

Get IMCB's fund flows by email, every Monday.

Plus the Friday ETF note. Confirm from the link that arrives, and unsubscribe in one click. See Privacy.

Client brief · page 1 of 2Report BR-04B48A3FED

IMCB and VXF are built for the same job. How do they differ in cost, holdings and results?

  1. What each follows. IMCB follows Morningstar US Mid Cap Index and VXF follows S&P Completion Index.
  2. Holdings in common. 12% of the weight is in the same securities (holdings dated Oct 19, 2026 and Sep 30, 2026).
  3. One-year total return. Over 1 year to Oct 20, 2026 IMCB returned +19.2% and VXF +9.9% with distributions reinvested, a gap of 9.3 points.

Data as of Oct 20, 2026. The differences are picked by a fixed rule, in a fixed order; the PDF prints it. Page 2 has the returns, overlap, risks and sources.

Take this comparison to a client

The two-page PDF for this pair is coming. Save the comparison to follow its changes. Free. It needs an email sign-in, once.

Not advice. The brief uses the figures on this page, with the data date and a report id. Saved comparisons are listed on your saved page; privacy.

What they hold in common

By the books each fund has filed, IMCB and VXF hold 12% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 19, 2026.

half

12% in common

Positions both hold, largest shared weight first
Holding IMCB VXF
SNOWFLAKE 0.74% 1.42%
CLOUDFLARE CLASS A 0.67% 1.35%
CHENIERE ENERGY 0.41% 0.67%
NATERA 0.38% 0.72%
STRATEGY INC CLASS A 0.35% 0.67%
ASTERA LABS 0.31% 0.67%
REVOLUTION MEDICINES 0.26% 0.51%
TWILIO CLASS A 0.26% 0.54%
ROBLOX CLASS A 0.23% 0.34%
ALNYLAM PHARMACEUTICALS 0.22% 0.40%
SUNBELT RENTALS HOLDINGS INC 0.22% 0.36%
CREDO TECHNOLOGY GROUP HOLDING LTD 0.20% 0.40%
Only in IMCB
MARATHON PETROLEUM 0.93%
DELL TECHNOLOGIES INC CLASS C 0.91%
VALERO ENERGY CORP 0.87%
PHILLIPS 66 0.81%
AUTOMATIC DATA PROCESSING INC 0.80%
FORTINET 0.75%
FREEPORT MCMORAN INC 0.70%
BANK OF NEW YORK MELLON CORP 0.67%
Only in VXF
Space Exploration Technologies Corp 2.50%
SLCMT1142 2.26%
Okta Inc 0.42%
Atlassian Corp 0.35%
Guardant Health Inc 0.29%
Roku Inc 0.24%
Amrize Ltd 0.23%
Nutanix Inc 0.23%

Check overlap with more funds →

On the same fields

IMCB
iShares Morningstar Mid-Cap ETF
VXF
Vanguard Extended Market ETF
Where it sits Stock ETF Stock ETF
What it is Tracks an index Tracks an index of Extended Market
Total return, 1 year +19.2% +9.9%
Expense ratio 0.04% 0.05%
Already in the S&P 500 86.3% 0.0%
Holdings 394 3361
Net assets, IMCB as of Oct 20, 2026 and VXF as of Sep 30, 2026 $1.7bn $30.2bn

IMCB and VXF on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.

About IMCB

IMCB tracks an index. Over the year to Oct 20, 2026 it returned +19.2% with distributions reinvested. The prospectus expense ratio is 0.04% a year. By its holdings published by its issuer for Oct 19, 2026, 86% of the fund by weight is stocks the S&P 500 also holds, across 394 positions, with the top ten at 7.9%. It sat 3.3% below its high of Aug 14, 2026 on Oct 20, 2026.

About VXF

VXF tracks an index of Extended Market. Over the year to Oct 20, 2026 it returned +9.9% with distributions reinvested. The prospectus expense ratio is 0.05% a year. By its holdings published by its issuer as of Sep 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 3,361 positions, with the top ten at 11.3%. It sat 7.9% below its high of Aug 14, 2026 on Oct 20, 2026.

Questions people ask

Which returned more over the last year, IMCB or VXF?
In the year to Oct 20, 2026, with distributions reinvested, IMCB returned +19.2% and VXF +9.9%.
Which is cheaper, IMCB or VXF?
IMCB is cheaper, by 0.01 percentage points a year. That is about $1 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do IMCB and VXF overlap with the S&P 500?
By their latest filed holdings, 86% of IMCB and 0% of VXF by weight is stocks the S&P 500 already holds.
Cite this pageCitation, APA and Markdown

ETFIQ, IMCB against VXF, data as of Oct 20, 2026. https://etfiq.com/compare/any/imcb-vs-vxf

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.