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MDYGvsSPMDETF 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

SPMD

State Street SPDR Portfolio S&P 400 Mid Cap ETF

This fund is part of

US Mid Cap

+0.69%

Full SPMD fund page

State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) belongs to the US Mid Cap Growth segment. State Street SPDR Portfolio S&P 400 Mid Cap ETF (SPMD) is part of the US Mid Cap segment. MDYG's top 3 sector exposures are Industrials, Technology and Healthcare. In contrast, SPMD's top sector exposures are Finance, Industrials and Technology. MDYG is more expensive with a Total Expense Ratio (TER) of 0.15%, versus 0.03% for SPMD. MDYG is up 13.94% year-to-date (YTD) with +$10M in YTD flows. SPMD performs worse with 11.81% YTD performance, and +$2.01B in YTD flows. Run a side-by-side ETF comparison of MDYG and SPMD 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 SPMD 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 SPMD	-7.53%-6.41%	-3.49%-2.00%	+13.94%+11.81%	+15.36%+13.62%	+51.85%+49.19%	+41.26%+47.51%
Flows	MDYG SPMD	+$22M+$752M	+$47M+$1.39B	+$10M+$2.01B	+$6M+$2.61B	+$27M+$7.61B	+$319M+$10.02B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	MDYG SPMD	+15.51%+12.25%	+17.72%+15.35%	+18.95%+17.85%	+20.78%+19.57%
Max drawdown	MDYG SPMD	-8.24%-7.17%	-9.91%-8.82%	-25.46%-23.98%	-29.25%-23.98%
Max drawdown duration	MDYG SPMD	31d32d	45d53d	379d379d	834d379d

Trading data

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	MDYG	SPMD
Last sale 9/18/2026 at 1:30 PM	$105.02	$64.15
Previous close 09/17/2026	$105.01	$64.36
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	SPMD
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	SPMD
Last price	$105.02	$64.15
1D performance	+0.01%	-0.33%
AuM	$2.78 B	$18.69 B
E/R	0.15%	0.03%

Characteristics

	MDYG	SPMD
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	November 8, 2005
ESG	No	No

More MDYG data on Trackinsight

More SPMD data on Trackinsight

Exposure

Countries

MDYG

USA

94.73%

Other

5.27%

SPMD

USA

96.29%

Other

3.71%

Sectors

MDYG

Industrials

20.61%

Technology

19.17%

Healthcare

15.46%

Finance

14.43%

Non-Energy Materi.

9.26%

Other

21.06%

SPMD

Finance

23.11%

Industrials

17.06%

Technology

13.59%

Non-Energy Materi.

10.23%

Healthcare

10%

Other

26.01%

Diversification

MDYG

Total weight of top 15 holdings out of 15

19.58%

SPMD

Total weight of top 15 holdings out of 15

10.52%

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%

SPMD

Illumina, Inc.

0.87%

Twilio, Inc.

0.84%

TechnipFMC plc

0.80%

Curtiss-Wright Corp.

0.75%

Carpenter Technology Corp.

0.72%

ATI, Inc.

0.72%

nVent Electric Plc

0.70%

Everpure, Inc.

0.68%

Okta, Inc.

0.67%

XPO, Inc.

0.66%

Burlington Stores, Inc.

0.65%

US Foods Holding Corp.

0.62%

United Therapeutics Corp.

0.62%

Tenet Healthcare Corp.

0.62%

Woodward, Inc.

0.60%

Frequently asked questions about MDYG and SPMD

How have the MDYG and SPMD ETFs performed in 2026?

As of September 17, 2026, MDYG is up 13.94% year-to-date (YTD), while SPMD has returned 11.81%. That puts MDYG better performer ahead so far this year.

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

Year-to-date, the MDYG ETF saw +$10M in flows, compared to +$2.01B for SPMD.

Which ETF is more volatile: MDYG or SPMD?

Over the past year, MDYG had a volatility of 17.72%, while SPMD experienced 15.35%.

Which ETF is bigger: MDYG or SPMD?

As of September 17, 2026, MDYG holds $2.78 B in assets under management (AUM), while SPMD manages $18.69 B.

What sectors do the MDYG and SPMD ETFs invest in?

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

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

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

MDYGvsSPMDETF Comparison

State Street SPDR S&P 400 Mid Cap Growth ETF

State Street SPDR Portfolio S&P 400 Mid Cap ETF

MDYG vs SPMD 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 SPMD ETFs performed in 2026?

As of September 17, 2026, MDYG is up 13.94% year-to-date (YTD), while SPMD has returned 11.81%. That puts MDYG better performer ahead so far this year.

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

Year-to-date, the MDYG ETF saw +$10M in flows, compared to +$2.01B for SPMD.

Which ETF is more volatile: MDYG or SPMD?

Over the past year, MDYG had a volatility of 17.72%, while SPMD experienced 15.35%.

Which ETF is bigger: MDYG or SPMD?

As of September 17, 2026, MDYG holds $2.78 B in assets under management (AUM), while SPMD manages $18.69 B.

What sectors do the MDYG and SPMD ETFs invest in?

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

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

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

Which ETF is more diversified: MDYG or SPMD?

MDYG holds 245 securities with 19.58% of its assets in the top 15. SPMD has 400 securities and a top 15 weight of 10.52%.

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