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MDYGvsMDYETF Comparison

ETF 1

MDYG

State Street SPDR S&P 400 Mid Cap Growth ETF

This fund is part of

US Mid Cap Growth

+0.82%

Full MDYG fund page

VS

ETF 2

MDY

State Street SPDR S&P MIDCAP 400 ETF Trust

This fund is part of

US Mid Cap

+0.69%

Full MDY fund page

State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) belongs to the US Mid Cap Growth segment. State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) is part of the US Mid Cap segment. MDYG's top 3 sector exposures are Industrials, Technology and Healthcare. In contrast, MDY's top sector exposures are Finance, Industrials and Technology. MDYG is less expensive with a Total Expense Ratio (TER) of 0.15%, versus 0.23% for MDY. MDYG is up 13.94% year-to-date (YTD) with +$10M in YTD flows. MDY performs worse with 11.54% YTD performance, and -$1.16B in YTD flows. Run a side-by-side ETF comparison of MDYG and MDY below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.

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MDYG vs MDY performance and flow charts

Performance

Cumulative Flows

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Daily, global ETF data for advanced analysis or integration into apps (API), from our partner Trackinsight.

Data Services

Historic performance and flows

Data as of 09/17/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	MDYG MDY	-7.53%-6.39%	-3.49%-2.08%	+13.94%+11.54%	+15.36%+13.25%	+51.85%+47.90%	+41.26%+45.65%
Flows	MDYG MDY	+$22M-$2M	+$47M-$709M	+$10M-$1.16B	+$6M-$1.52B	+$27M-$1.21B	+$319M-$1.88B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	MDYG MDY	+15.51%+11.87%	+17.72%+15.39%	+18.95%+17.78%	+20.78%+19.72%
Max drawdown	MDYG MDY	-8.24%-7.14%	-9.91%-8.78%	-25.46%-23.91%	-29.25%-23.91%
Max drawdown duration	MDYG MDY	31d32d	45d53d	379d379d	834d379d

Trading data

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	MDYG	MDY
Last sale 9/18/2026 at 1:30 PM	$105.02	$665.87
Previous close 09/17/2026	$105.01	$669.43
Consolidated volume 09/17/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of August 31, 2026

1-year trailing difference

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	MDYG	MDY
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 9/18/2026 at 1:30 PM

Live

Closed

	MDYG	MDY
Last price	$105.02	$665.87
1D performance	+0.01%	-0.53%
AuM	$2.78 B	$25.65 B
E/R	0.15%	0.23%

Characteristics

	MDYG	MDY
Management strategy	Passive	Passive
Provider	State Street Investment Management	State Street Investment Management
Benchmark	S&P MidCap 400 Growth Index	S&P MidCap 400 Index
N° of holdings	245	400
Asset class	Equities	Equities
Trailing 12m distribution yield	Join	Join
Inception date	November 8, 2005	May 4, 1995
ESG	No	No

More MDYG data on Trackinsight

More MDY data on Trackinsight

Exposure

Countries

MDYG

USA

94.73%

Other

5.27%

MDY

USA

95.79%

Other

4.21%

Sectors

MDYG

Industrials

20.61%

Technology

19.17%

Healthcare

15.46%

Finance

14.43%

Non-Energy Materi.

9.26%

Other

21.06%

MDY

Finance

23%

Industrials

16.96%

Technology

13.52%

Non-Energy Materi.

10.18%

Healthcare

9.95%

Other

26.4%

Diversification

MDYG

Total weight of top 15 holdings out of 15

19.58%

MDY

Total weight of top 15 holdings out of 15

10.46%

Top 15 holdings

Data as of July 31, 2026

MDYG

Twilio, Inc.

1.65%

TechnipFMC plc

1.57%

Curtiss-Wright Corp.

1.47%

Carpenter Technology Corp.

1.42%

ATI, Inc.

1.41%

nVent Electric Plc

1.37%

Everpure, Inc.

1.34%

Okta, Inc.

1.31%

XPO, Inc.

1.30%

United Therapeutics Corp.

1.21%

Tenet Healthcare Corp.

1.20%

Woodward, Inc.

1.18%

RB Global, Inc.

1.12%

Roku, Inc.

1.04%

Sterling Infrastructure, Inc.

1.01%

MDY

Illumina, Inc.

0.87%

Twilio, Inc.

0.84%

TechnipFMC plc

0.80%

Curtiss-Wright Corp.

0.75%

Carpenter Technology Corp.

0.72%

ATI, Inc.

0.71%

nVent Electric Plc

0.69%

Everpure, Inc.

0.68%

Okta, Inc.

0.66%

XPO, Inc.

0.66%

Burlington Stores, Inc.

0.65%

US Foods Holding Corp.

0.62%

United Therapeutics Corp.

0.61%

Tenet Healthcare Corp.

0.61%

Woodward, Inc.

0.60%

Frequently asked questions about MDYG and MDY

How have the MDYG and MDY ETFs performed in 2026?

As of September 17, 2026, MDYG is up 13.94% year-to-date (YTD), while MDY has returned 11.54%. That puts MDYG better performer ahead so far this year.

Which ETF is attracting more investor money: MDYG or MDY?

Year-to-date, the MDYG ETF saw +$10M in flows, compared to -$1.16B for MDY.

Which ETF is more volatile: MDYG or MDY?

Over the past year, MDYG had a volatility of 17.72%, while MDY experienced 15.39%.

Which ETF is bigger: MDYG or MDY?

As of September 17, 2026, MDYG holds $2.78 B in assets under management (AUM), while MDY manages $25.65 B.

What sectors do the MDYG and MDY ETFs invest in?

MDYG leans toward sectors like Industrials, Technology and Healthcare. Meanwhile, MDY focuses on Finance, Industrials and Technology.

What are the top holdings of the MDYG ETF and MDY ETF?

MDYG top holdings include Twilio, Inc., TechnipFMC plc and Curtiss-Wright Corp.. MDY holds in its top three: Illumina, Inc., Twilio, Inc. and TechnipFMC plc.

MDYGvsMDYETF Comparison

State Street SPDR S&P 400 Mid Cap Growth ETF

State Street SPDR S&P MIDCAP 400 ETF Trust

MDYG vs MDY performance and flow charts

Performance

Cumulative Flows

Get all the metrics on this page, and more, through a reliable ETF data feed

Countries

Sectors

Diversification

Top 15 holdings

How have the MDYG and MDY ETFs performed in 2026?

As of September 17, 2026, MDYG is up 13.94% year-to-date (YTD), while MDY has returned 11.54%. That puts MDYG better performer ahead so far this year.

Which ETF is attracting more investor money: MDYG or MDY?

Year-to-date, the MDYG ETF saw +$10M in flows, compared to -$1.16B for MDY.

Which ETF is more volatile: MDYG or MDY?

Over the past year, MDYG had a volatility of 17.72%, while MDY experienced 15.39%.

Which ETF is bigger: MDYG or MDY?

As of September 17, 2026, MDYG holds $2.78 B in assets under management (AUM), while MDY manages $25.65 B.

What sectors do the MDYG and MDY ETFs invest in?

MDYG leans toward sectors like Industrials, Technology and Healthcare. Meanwhile, MDY focuses on Finance, Industrials and Technology.

What are the top holdings of the MDYG ETF and MDY ETF?

MDYG top holdings include Twilio, Inc., TechnipFMC plc and Curtiss-Wright Corp.. MDY holds in its top three: Illumina, Inc., Twilio, Inc. and TechnipFMC plc.

Which ETF is more diversified: MDYG or MDY?

MDYG holds 245 securities with 19.58% of its assets in the top 15. MDY has 400 securities and a top 15 weight of 10.46%.

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