EtfWatch

Stocks entering a major index

Every addition to the index behind SPY, IVV, VOO, QQQ, QQQM, MDY, IJH, IJR, SLY, ISF, VUKE, CUKX, EXS1, DBXD, XDAX, 1321.T, 1330.T, EWJ, 2800.HK, EWH over the last two years: when it took effect, who it replaced, and how the stock traded 1 week, 1 month, 3 months, 6 months and 1 year after the effective close.

Returns

The register

43 of 43 entries. Tick entries to compare them.

Index additions with dates and returns after the effective close
No.CompareDate announcedIndexSectorReplaces
043RBLXRobloxNot yet effectiveNot yet elapsedNot yet elapsedNot yet elapsedNot yet elapsedNot yet elapsedSep 4, 2026Aug 14, 2026Nasdaq-100Communication ServicesPaccar
042SNOWSnowflake+1.5%+6.7%Not yet elapsedNot yet elapsedNot yet elapsedJun 22, 2026Jun 12, 2026Nasdaq-100Information TechnologyZscaler
041CRWVCoreWeave-2.9%-11.8%+6.6%Not yet elapsedNot yet elapsedMar 23, 2026Mar 13, 2026Nasdaq-100Information TechnologyMarvell Technology
039COINCoinbase Global-2.4%+4.5%+15.2%+7.6%Not yet elapsedDec 22, 2025Dec 12, 2025Nasdaq-100FinancialsON Semiconductor
040HOODRobinhood Markets-1.2%+8.0%+21.0%+29.6%Not yet elapsedDec 22, 2025Dec 12, 2025Nasdaq-100FinancialsBiogen
038APPAppLovin-0.7%-4.2%+5.6%+13.9%Not yet elapsedDec 22, 2025Dec 12, 2025Nasdaq-100Information TechnologyGlobalFoundries
037HOODRobinhood Markets+3.4%+10.2%+18.6%+28.8%Not yet elapsedSep 22, 2025Sep 5, 2025S&P 500FinancialsCaesars Entertainment
035APPAppLovin+2.8%+10.1%+17.4%+26.6%Not yet elapsedSep 22, 2025Sep 5, 2025S&P 500Information TechnologyMarketAxess Holdings
036EMEEMCOR Group+0.8%+3.1%+6.3%+9.4%Not yet elapsedSep 22, 2025Sep 5, 2025S&P 500IndustrialsEnphase Energy
034IBKRInteractive Brokers Group+1.6%+6.5%+12.9%+19.4%Not yet elapsedAug 28, 2025Aug 22, 2025S&P 500FinancialsWalgreens Boots Alliance
033XYZBlock, Inc.-2.6%-7.7%+2.6%+9.0%+17.9%Jul 23, 2025Jul 18, 2025S&P 500FinancialsHess
031DDOGDatadog-3.2%-6.5%+6.5%+16.1%+22.6%Jul 9, 2025Jul 2, 2025S&P 500Information TechnologyJuniper Networks
032DDOGDatadog-3.2%-6.5%+6.5%+16.1%+22.6%Jul 9, 2025Jul 2, 2025Nasdaq-100Information TechnologyOld Dominion Freight Line
029COINCoinbase Global-2.3%-5.3%+17.4%+13.6%+28.8%May 19, 2025May 12, 2025S&P 500FinancialsDiscover Financial Services
030SHOPShopify+2.9%+8.7%+43.7%+55.3%+37.9%May 19, 2025May 12, 2025Nasdaq-100Information TechnologyMongoDB
026EXEExpand Energy-1.9%+3.7%-3.7%-14.8%-18.5%Mar 24, 2025Mar 7, 2025S&P 500EnergyFMC Corporation
025DASHDoorDash-1.1%+3.9%+23.6%+37.6%+18.0%Mar 24, 2025Mar 7, 2025S&P 500Consumer DiscretionaryBorgWarner
027TKOTKO Group Holdings-3.0%+2.4%+10.1%+16.1%+10.1%Mar 24, 2025Mar 7, 2025S&P 500Communication ServicesTeleflex
028WSMWilliams-Sonoma-1.9%+2.5%+7.6%+17.1%+13.9%Mar 24, 2025Mar 7, 2025S&P 500Consumer DiscretionaryCelanese
019APOApollo Global Management-4.0%-5.7%-20.0%-24.6%-21.1%Dec 23, 2024Dec 6, 2024S&P 500FinancialsQorvo
020WDAYWorkday-2.2%-3.7%-10.4%-12.3%-13.4%Dec 23, 2024Dec 6, 2024S&P 500Information TechnologyAmentum Holdings
023PLTRPalantir Technologies-2.5%+2.5%+10.0%+65.0%+122.5%Dec 23, 2024Dec 13, 2024Nasdaq-100Information TechnologyIllumina
022MSTRMicroStrategy-7.1%0.0%-14.3%+8.6%-32.9%Dec 23, 2024Dec 13, 2024Nasdaq-100Information TechnologyModerna
021AXONAxon Enterprise-0.8%+8.5%-11.9%+35.6%+16.9%Dec 23, 2024Dec 13, 2024Nasdaq-100IndustrialsSuper Micro Computer
024TTDThe Trade Desk-1.7%+1.7%-50.0%-43.3%-61.7%Dec 23, 2024Dec 13, 2024Nasdaq-100Communication ServicesDollar Tree
018TPLTexas Pacific Land+0.7%-10.7%-4.7%-19.5%-34.9%Nov 26, 2024Nov 22, 2024S&P 500EnergyMarathon Oil
017AMTMAmentum Holdings-4.2%-8.3%-12.5%-29.2%-8.3%Nov 15, 2024Nov 8, 2024S&P 500IndustrialsAdded as a Jacobs spin-off
016UALUnited Airlines Holdings+9.1%+34.5%+81.8%+41.8%+74.5%Oct 1, 2024Sep 27, 2024S&P 500IndustrialsBio-Techne
015LIILennox International+0.8%+4.1%+4.1%-7.3%-11.4%Oct 1, 2024Sep 27, 2024S&P 500IndustrialsCatalent
014PLTRPalantir Technologies+2.8%+19.4%+108.3%+166.7%+302.8%Sep 23, 2024Sep 6, 2024S&P 500Information TechnologyAmerican Airlines
012DELLDell Technologies+1.7%+5.1%-1.7%-22.0%+10.2%Sep 23, 2024Sep 6, 2024S&P 500Information TechnologyEtsy
013ERIEErie Indemnity-1.5%-5.3%-20.5%-28.0%-34.7%Sep 23, 2024Sep 6, 2024S&P 500FinancialsBio-Rad Laboratories
011ARMArm Holdings-16.5%-25.3%-5.1%-20.9%+4.4%Jul 22, 2024Jul 12, 2024Nasdaq-100Information TechnologySirius XM Holdings
008CRWDCrowdStrike0.0%-31.9%-28.6%-11.7%+24.7%Jun 24, 2024Jun 7, 2024S&P 500Information TechnologyRobert Half
009GDDYGoDaddy+0.7%+2.1%+10.3%+37.9%+20.7%Jun 24, 2024Jun 7, 2024S&P 500Information TechnologyIllumina (moved to MidCap 400)
010KKRKKR & Co.+1.9%+11.1%+22.2%+38.9%+13.0%Jun 24, 2024Jun 7, 2024S&P 500FinancialsComerica (moved to MidCap 400)
007VSTVistra+4.4%-3.3%-9.9%+41.8%+67.0%May 8, 2024Apr 26, 2024S&P 500UtilitiesPioneer Natural Resources
006GEVGE Vernova+5.0%+14.3%+22.9%+114.3%+250.0%Apr 2, 2024Mar 26, 2024S&P 500UtilitiesAdded as a GE spin-off
005SOLVSolventum+2.9%-7.4%-11.8%+4.4%+7.4%Apr 1, 2024Mar 26, 2024S&P 500Health CareAdded as a 3M spin-off
002SMCISuper Micro Computer-4.0%-18.0%-42.0%-69.0%-58.0%Mar 18, 2024Mar 1, 2024S&P 500Information TechnologyWhirlpool
001DECKDeckers Outdoor-2.0%-5.9%-2.6%+13.2%-19.7%Mar 18, 2024Mar 1, 2024S&P 500Consumer DiscretionaryZions Bancorporation
004SMCISuper Micro Computer-4.0%-18.0%-42.0%-69.0%-58.0%Mar 18, 2024Mar 8, 2024Nasdaq-100Information TechnologyWalgreens Boots Alliance
003DECKDeckers Outdoor-2.0%-5.9%-2.6%+13.2%-19.7%Mar 18, 2024Mar 8, 2024Nasdaq-100Consumer DiscretionaryIllumina

Losses are entered in red. A blank cell means that window hasn't elapsed yet.

How index additions work

Index committees review the indexes we track on a published schedule and also make ad hoc changes when a constituent is acquired, delisted or no longer eligible. A change is announced first and only takes effect after the close on the effective date. Between those two dates, every fund tracking the index has to buy the incoming stock, which is why the window matters to traders.

Of the 43 additions with a recorded announcement date, the median notice between the announcement and the effective close is 10 days.

What happens to a stock after it joins an index

Inclusion is often described as a guaranteed pop. The tracked history is more mixed: the average stock ran up +20.0% in the 30 days into the effective close, then returned -0.9% in the first week (38% of additions were positive), -0.4% after one month, and +21.0% after a year. Returns are measured from the effective close and can also be viewed against the index itself, so a rising market doesn't get counted as an inclusion effect.

Best one-year outcome in this set: PLTR (Palantir Technologies) at +302.8%. Worst: TTD (The Trade Desk) at -61.7%.

When are index changes announced?

Review cadences differ by index provider. Scheduled review, announcement and effective dates for the next twelve months are listed on the index review calendar. Ad hoc changes — a takeover, a bankruptcy, a fast-track promotion — are announced outside that schedule, usually with a few days' notice.

Currently pending: RBLX (Nasdaq-100, effective Sep 4, 2026).

Open the index review calendar — pending now: RBLX.

Most recent additions