NYSE Arca · Mid-Cap Blend · USD · ETF

State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) ETF Analysis

MDY

Expense ratio 0.23% Yield 1.07% Assets $25.22B Since May 4, 1995 Family State Street Investment Management

Last Updated: October 21, 2026

$669.42

+$2.50 (+0.37%)

October 21, 2026 · Market close

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Price History

Hover for the daily close. The dotted line marks the period open.

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Key facts

As of October 21, 2026, the annualized return for MDY over 10 years is +10.55%.

MDY charges an expense ratio of 0.23%.

MDY has $25.22B in net assets.

MDY Annualized Returns

With dividends reinvested · as of October 21, 2026

Period	Total return	Annualized	$100 becomes	$300 becomes
1 year	+13.17%	+13.17%	$113.17	$339.50
3 years	+58.62%	+16.62%	$158.62	$475.86
5 years	+39.86%	+6.94%	$139.86	$419.58
10 years	+172.54%	+10.55%	$272.54	$817.61

Returns are total returns computed from daily closes, with dividends reinvested. As of October 21, 2026.

MDY Return by Calendar Year

2016 and 2026 are partial years

+25.78%−13.28%+11.78%

2016*2017201820192020202120222023202420252026*

View as table ↓View as chart ↑

Year	Return
2026 (partial year)	+11.78%
2025	+7.19%
2024	+13.64%
2023	+16.07%
2022	−13.28%
2021	+24.20%
2020	+13.50%
2019	+25.78%
2018	−11.29%
2017	+15.93%
2016 (partial year)	+6.66%

MDY Monthly Returns

−21%+15%

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2026	+4.0	+4.0	−5.3	+7.7	+2.5	+3.6	−2.4	+0.1	−4.2	+1.9	—	—
2025	+3.7	−4.2	−5.5	−2.4	+5.4	+3.6	+1.6	+3.4	+0.4	−0.5	+2.1	−0.0
2024	−1.7	+5.9	+5.6	−6.0	+4.5	−1.7	+5.8	−0.1	+1.1	−0.7	+8.9	−7.2
2023	+9.3	−1.9	−3.2	−0.8	−3.2	+9.2	+4.1	−3.0	−5.3	−5.3	+8.4	+8.6
2022	−7.3	+1.1	+1.3	−7.1	+0.7	−9.6	+10.9	−3.2	−9.2	+10.5	+6.0	−5.5
2021	+1.4	+6.8	+4.9	+4.3	+0.2	−1.4	+0.3	+2.0	−4.0	+5.9	−3.0	+5.1
2020	−2.6	−9.4	−20.2	+14.0	+7.2	+1.3	+4.7	+3.5	−3.3	+2.2	+14.3	+6.5
2019	+10.3	+4.3	−0.6	+4.0	−8.1	+7.8	+0.9	−4.1	+3.1	+1.1	+2.9	+2.8
2018	+2.8	−4.4	+1.0	−0.4	+4.1	+0.4	+1.7	+3.2	−1.1	−9.6	+3.2	−11.3
2017	+1.6	+2.6	−0.5	+0.8	−0.5	+1.5	+0.9	−1.5	+3.9	+2.2	+3.7	+0.2

Monthly total returns with dividends reinvested; each cell prints its signed value.

MDY Volatility & Risk

Volatility: 10 yrs · Beta: 3 yrs

Annualized volatility: 21.14%
Beta (3y): 1.00
Best year: +25.78%
Worst year: −13.28%

Volatility is the annualized standard deviation of daily returns. As of October 21, 2026.

Top Holdings

#	Symbol	Name	Weight
1	TWLO	Twilio Inc Class A	1%
2	ILMN	Illumina Inc	0.91%
3	FTI	TechnipFMC PLC	0.87%
4	P	Everpure Inc Class A	0.82%
5	OKTA	Okta Inc Class A	0.81%
6	ATI	ATI Inc	0.78%
7	NVT	nVent Electric PLC	0.68%
8	CRS	Carpenter Technology Corp	0.66%
9	USFD	US Foods Holding Corp	0.65%
10	THC	Tenet Healthcare Corp	0.64%

Analysis

Data-derived

Fund Overview

State Street SPDR S&P MIDCAP 400 ETF Trust trades as MDY and is categorised as Mid-Cap Blend. The fund is issued by State Street Investment Management. The inception date on file is May 4, 1995. Total net assets stand at $25.22B. Annual costs run at an expense ratio of 0.23%. On a $10,000 position that is $23.00 a year.

The largest positions on file are Twilio Inc Class A (TWLO), Illumina Inc (ILMN), and TechnipFMC PLC (FTI). Twilio Inc Class A alone accounts for 1% of the portfolio. The ten largest positions together make up 7.84% of the fund.

Performance Analysis

MDY last closed at $669.42 on October 21, 2026. The trailing one-year total return is +13.17%. Measured over 10 years, that is +10.55% a year compounded. The trailing distribution yield is 1.07%.

So far in 2026 the total return is +11.78%. Across the complete calendar years on file, 2019 returned +25.78% and 2022 returned −13.28%. Of the 9 complete calendar years on file, 7 finished higher.

Price & Risk Profile

The 52-week range on file runs from $568.21 to $717.35. The latest close sits 17.81% above that 52-week low. Annualized volatility over the trailing 10 years is 21.14%. The reported beta is 1. The volatility figure is calculated from the stored daily closes, the same series the charts on this page use.

Every figure above is read from this page's own data on each daily rebuild. Informational only, not financial advice. As of October 21, 2026.

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