S&P U.S. Indices Eligible Exchanges Methodology Update

S&P Global (NYSE:SPGI), via S&P Dow Jones Indices, will add the Texas Stock Exchange (TXSE) to the eligible exchange list for S&P U.S. Indices.

Rhea-AI Summary

S&P Global (NYSE:SPGI), via S&P Dow Jones Indices, will add the Texas Stock Exchange (TXSE) to the eligible exchange list for S&P U.S. Indices.

The change becomes effective when TXSE continuous trading starts, targeted for July 6, 2026, and is not expected to have immediate index impact.

Argus May 28 session

+0.45% close to close Open Argus

Details

News Market Reaction – SPGI

In the May 28 session, SPGI gained 0.45%, reflecting a mild positive market reaction.

Data tracked by StockTitan Argus on the day of publication.

Market Context

This announcement updates S&P U.S. Indices methodology to add the Texas Stock Exchange as an eligibl...

Analysis

This announcement updates S&P U.S. Indices methodology to add the Texas Stock Exchange as an eligible venue once continuous trading begins on July 6, 2026. Core benchmarks such as the S&P 500, S&P MidCap 400, S&P SmallCap 600, S&P Composite 1500, and S&P Total Market Index are impacted at the eligibility‑rules level. Investors may watch how TXSE listings evolve and whether new constituents ultimately enter these indices under the unchanged broader criteria.

Key Figures

TXSE trading start: July 6, 2026 S&P 500 code: 500 S&P MidCap 400 code: 400 +4 more

TXSE trading start

July 6, 2026

Target date for commencement of continuous trading on TXSE

S&P 500 code

500

Index code for S&P 500 in impacted indices list

S&P MidCap 400 code

400

Index code for S&P MidCap 400

S&P SmallCap 600 code

600

Index code for S&P SmallCap 600

S&P Composite 1500 code

1500

Index code for S&P Composite 1500

S&P TMI code

SPTMI

Index code for S&P Total Market Index

S&P Completion Index code

SPCMI

Index code for S&P Completion Index

Historical Context

5 past events · Latest: May 26

5 events

1. May 26

   Index milestone

   24h Move

   -1.2%

   DJIA 130th anniversary and long-term level milestones highlighted by SPGI.

2. May 26

   Product collaboration

   24h Move

   -1.2%

   CARFAX Canada and UCDA expand VIN fraud detection collaboration tools.

3. May 26

   Housing data release

   24h Move

   -1.2%

   Case‑Shiller March 2026 home price indices show modest national gains.

4. May 26

   Leadership change

   24h Move

   -1.2%

   Market Intelligence president departure and data organization realignment.

5. May 21

   Index reconstitution

   24h Move

   +0.5%

   UTI and PTON set to join S&P SmallCap 600 index.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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NEW YORK, May 27, 2026 /PRNewswire/ -- S&P Dow Jones Indices ("S&P DJI") announces a methodology change to the S&P U.S. Indices' list of eligible exchanges.

To support the indices' objective of measuring the market performance of U.S.-domiciled stocks trading on U.S. exchanges, S&P DJI will add the Texas Stock Exchange ("TXSE") as an eligible exchange for the S&P U.S. Indices. TXSE has announced a target date of July 6, 2026, for the launch of continuous trading. Accordingly, effective upon the commencement of continuous trading on TXSE, the exchange will be added to the list of eligible exchanges in the S&P U.S. Indices Methodology.

This change is not expected to have any immediate impact on the indices. Upon effectiveness, securities listed on TXSE may be considered eligible for inclusion in the S&P U.S. Indices, subject to meeting all other applicable index eligibility criteria.

	Methodology
Change	Previous	Updated
Exchange Listing	Must have a listing on one of the following U.S. exchanges: •  NYSE •  NYSE Arca •  NYSE American •  Nasdaq Global Select Market •  Nasdaq Global Market •  Nasdaq Capital Market •  Cboe BZX •  Cboe BYX •  Cboe EDGA •  Cboe EDGX	Must have a listing on one of the following U.S. exchanges: •  NYSE •  NYSE Arca •  NYSE American •  Nasdaq Global Select Market •  Nasdaq Global Market •  Nasdaq Capital Market •  Cboe BZX •  Cboe BYX •  Cboe EDGA •  Cboe EDGX •  Texas Stock Exchange

IMPACTED INDICES

Index Name	Index Code
S&P 500	500
S&P MidCap 400	400
S&P SmallCap 600	600
S&P Composite 1500	1500
S&P Total Market Index	SPTMI
S&P Completion Index	SPCMI

Please note that this change will also apply to indices that use the impacted indices as a starting universe. For example, such indices include, but are not limited to, size, sector, style, factor, and sustainability indices derived from the impacted indices. Please refer to the individual index methodologies for more information.

IMPLEMENTATION TIMING 

S&P DJI is implementing the change in conjunction with the commencement of continuous trading on TXSE, which the exchange has announced to begin on Monday, July 6, 2026.

Please note that the S&P U.S. Indices Methodology on the S&P DJI website will be updated to reflect this change.

For more information about S&P Dow Jones Indices, please visit www.spglobal.com/spdji.

ABOUT S&P DOW JONES INDICES

S&P Dow Jones Indices is the largest global resource for essential index-based concepts, data and research, and home to iconic financial market indicators, such as the S&P 500^® and the Dow Jones Industrial Average^®. More assets are invested in products based on our indices than products based on indices from any other provider in the world. Since Charles Dow invented the first index in 1884, S&P DJI has been innovating and developing indices across the spectrum of asset classes helping to define the way investors measure and trade the markets.

S&P Dow Jones Indices is a division of S&P Global (NYSE: SPGI), which provides essential intelligence for individuals, companies and governments to make decisions with confidence. For more information, visit www.spglobal.com/spdji.

FOR MORE INFORMATION:
S&P Dow Jones Indices
index_services@spglobal.com

View original content:https://www.prnewswire.com/news-releases/sp-us-indices-eligible-exchanges-methodology-update-302783713.html

SOURCE S&P Dow Jones Indices

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What methodology change did S&P Global (SPGI) announce for S&P U.S. Indices on May 27, 2026?

S&P Global announced that the Texas Stock Exchange (TXSE) will be added as an eligible exchange for S&P U.S. Indices. According to S&P Dow Jones Indices, this aligns the methodology with U.S.-domiciled stocks trading on U.S. exchanges.

When will the Texas Stock Exchange become eligible for inclusion in S&P U.S. Indices (SPGI)?

TXSE becomes eligible when its continuous trading begins, targeted for July 6, 2026. According to S&P Dow Jones Indices, the eligibility starts effective upon commencement of continuous trading on the Texas Stock Exchange.

Which S&P U.S. Indices are impacted by adding the Texas Stock Exchange, relevant to SPGI investors?

The impacted indices include the S&P 500, S&P MidCap 400, S&P SmallCap 600, S&P Composite 1500, S&P Total Market Index, and S&P Completion Index. According to S&P Dow Jones Indices, derived size, sector, style, factor and sustainability indices are also affected.

Will adding the Texas Stock Exchange affect current S&P U.S. Index levels for SPGI benchmarks?

The change is not expected to have any immediate impact on S&P U.S. Indices. According to S&P Dow Jones Indices, securities listed on TXSE may become eligible for inclusion only if they meet all other index criteria.

What are the updated eligible U.S. exchanges for S&P U.S. Indices after the TXSE methodology change?

Eligible exchanges will include NYSE, NYSE Arca, NYSE American, the three Nasdaq tiers, four Cboe venues, and TXSE. According to S&P Dow Jones Indices, TXSE is added alongside existing U.S. exchanges in the index methodology.

How does the Texas Stock Exchange eligibility change affect derived S&P indices tracked by SPGI?

Indices using the impacted S&P U.S. Indices as their starting universe will also reflect TXSE eligibility. According to S&P Dow Jones Indices, this includes derived size, sector, style, factor and sustainability indices, subject to their individual methodologies.