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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 SPLG: how they differ

MDY and SPLG are both equity index funds, and over the year SPLG returned more, +17.6% against +13.0%.

SPDR S&P MidCap 400 ETF Trust and S&P 500, book from IVV.

MDY and SPLG on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
MDY
SPDR S&P MidCap 400 ETF Trust
SPLG
S&P 500, book from IVV
Where it sitsCore index fundCore index fund
IssuerState StreetS&P
What it isS&P MidCap 400, book from IJHS&P 500, book from IVV
Total return, 1 year+13.0%+17.6%
S&P 500 over the same days+17.5%+17.5%
Gap to the S&P 500−4.5 pts+0.1 pts
Expense ratio0.23%not published
Holdings400not filed

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.

SPLG in plain words

SPLG is an index equity fund tracking the S&P 500. Over the year to Sep 11, 2026 it returned +17.6% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100.

Questions people ask

Which returned more over the last year, MDY or SPLG?
In the year to Sep 12, 2026, with distributions reinvested, MDY returned +13.0% and SPLG returned +17.6%, so SPLG returned more. One year is one year; the longer windows are in the table.

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

A comparison is not a recommendation. Standards and sources