Which returned more over the last year, MDY or VBK?

In the year to Sep 12, 2026, with distributions reinvested, MDY returned +13.0% and VBK returned +13.8%, so VBK returned more. One year is one year; the longer windows are in the table.

Which is cheaper, MDY or VBK?

MDY charges 0.23% a year and VBK charges 0.05%, so VBK is cheaper. Fees come from each fund's prospectus.

How much do MDY and VBK overlap with the S&P 500?

By their latest filed holdings, 0% of MDY and 10% of VBK by weight is stocks the S&P 500 already holds. Between the two funds, 43% of their books are the same securities at the same weight.

Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.

ETFIQetfiq.com · independent ETF data

MDY vs VBK: how they differ

MDY and VBK hold 43% of their weight in the same names, and VBK returned more over the year.

SPDR S&P MidCap 400 ETF Trust and Vanguard Small-Cap Growth Index Fund.

What they hold in common

By the books each fund has filed, MDY and VBK hold 43% of their money in the same securities at the same weight.

Positions MDY and VBK both hold, largest shared weight first
Holding	MDY	VBK
TWILIO INC	0.86%	0.88%
CARPENTER TECHNOLOGY CORP	0.85%	0.82%
CURTISS-WRIGHT CORP	0.77%	0.79%
ENTEGRIS INC	0.76%	0.77%
ATI INC	0.74%	0.76%
MASTEC INC	0.71%	0.74%
WOODWARD INC	0.70%	0.71%
STERLING INFRASTRUCTURE INC	0.71%	0.69%
MACOM TECHNOLOGY SOLUTIONS HOLDINGS INC	0.69%	0.74%
EVERPURE INC	0.69%	0.70%
XPO INC	0.67%	0.65%
OKTA INC	0.63%	0.65%

Largest positions each one holds and the other does not
Only in MDY	Only in VBK
NVENT ELECTRIC PLC 0.76%	Credo Technology Group Holding Ltd 1.27%
TECHNIPFMC PLC 0.73%	REVOLUTION Medicines Inc 1.07%
US FOODS HOLDING CORP 0.62%	Astera Labs Inc 1.05%
FABRINET 0.56%	Natera Inc 1.04%
TD SYNNEX CORP 0.55%	Casey's General Stores Inc 0.83%
RELIANCE INC 0.53%	FTAI Aviation Ltd 0.78%
EAST WEST BANCORP INC 0.49%	nVent Electric PLC 0.77%
PERFORMANCE FOOD GROUP COMPANY 0.48%	TechnipFMC PLC 0.74%

Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026.

MDY and VBK on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
	MDY SPDR S&P MidCap 400 ETF Trust	VBK Vanguard Small-Cap Growth Index Fund
Where it sits	Core index fund	Core index fund
Issuer	State Street	Vanguard
What it is	S&P MidCap 400, book from IJH	Small-Cap Growth
Total return, 1 year	+13.0%	+13.8%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−4.5 pts	−3.7 pts
Expense ratio	0.23%	0.05%
Already in the S&P 500	0.0%	10.2%
Holdings	400	545

MDY in plain words

MDY is an index equity fund tracking the S&P MidCap 400. Over the year to Sep 11, 2026 it returned +13.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.23% a year. By its holdings filed for Jun 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 400 positions, with the top ten at 7.7%. It sat 5.3% below its high of Aug 14, 2026 on Sep 11, 2026.

VBK in plain words

VBK is an index equity fund tracking the Small-Cap Growth. Over the year to Sep 11, 2026 it returned +13.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.05% a year. By its holdings filed for Jun 30, 2026, 10% of the fund by weight is stocks the S&P 500 also holds, across 545 positions, with the top ten at 9.3%. It sat 7.0% below its high of Aug 17, 2026 on Sep 11, 2026.

Questions people ask

Which returned more over the last year, MDY or VBK?: In the year to Sep 12, 2026, with distributions reinvested, MDY returned +13.0% and VBK returned +13.8%, so VBK returned more. One year is one year; the longer windows are in the table.
Which is cheaper, MDY or VBK?: MDY charges 0.23% a year and VBK charges 0.05%, so VBK is cheaper. Fees come from each fund's prospectus.
How much do MDY and VBK overlap with the S&P 500?: By their latest filed holdings, 0% of MDY and 10% of VBK by weight is stocks the S&P 500 already holds. Between the two funds, 43% of their books are the same securities at the same weight.

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Where these figures came from

ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.

MDY against VBK, ETFIQ, data as of Sep 12, 2026. Every figure is arithmetic on a named public source; the method is at etfiq.com/methodology. A comparison is not a recommendation.

Cite this page. ETFIQ, MDY against VBK, data as of Sep 12, 2026. https://etfiq.com/compare/any/MDY-VBK Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources