S&P Index Addition: Stock Price Increase on addition to S&P500

Addition of a stock to S&P Index leads to an increase in the price of the stock - sometimes by upto 15% within a day. During Sept-2018 to Aug-2025, about 800 stocks were added to the S&P indexes. In this research, we provide the potential return from buying stocks added to S&P indexes and how to use our Alerts ( or Notifications) on Phone & email to learn about these additions before others & make these trading decisions.

Company Name	Ticker	Announced Date	Effective Date	Source Index	Final Index	% Change by Next Day Close *
Company Name 1	Stock-Ticker-1	09/24/2018	09/30/2018	S&P MIDCAP 400	S&P 500	2.21
Company Name 2	Stock-Ticker-2	10/03/2018	10/11/2018	S&P MIDCAP 400	S&P 500	1.72
Company Name 3	Stock-Ticker-3	10/30/2018	11/05/2018	S&P MIDCAP 400	S&P 500	4.59
Company Name 4	Stock-Ticker-4	11/06/2018	11/13/2018	S&P MIDCAP 400	S&P 500	1.87
Company Name 5	Stock-Ticker-5	11/26/2018	12/02/2018	None	S&P 500	4.51
Company Name 6	Stock-Ticker-6	11/26/2018	12/02/2018	S&P MIDCAP 400	S&P 500	2.04
Company Name 7	Stock-Ticker-7	12/19/2018	12/24/2018	None	S&P 500	5.25
Company Name 8	Stock-Ticker-8	01/14/2019	01/17/2019	S&P MIDCAP 400	S&P 500	1.08
Company Name 9	Stock-Ticker-9	02/07/2019	02/14/2019	S&P MIDCAP 400	S&P 500	1.31
Company Name 10	Stock-Ticker-10	02/20/2019	02/26/2019	S&P MIDCAP 400	S&P 500	1.55
Company Name 11	Stock-Ticker-11	06/23/2019	06/30/2019	S&P MIDCAP 400	S&P 500	1.01
Company Name 12	Stock-Ticker-12	07/08/2019	07/14/2019	None	S&P 500	4.82
Company Name 13	Stock-Ticker-13	07/31/2019	08/08/2019	S&P MIDCAP 400	S&P 500	6.65
Company Name 14	Stock-Ticker-14	09/16/2019	09/22/2019	None	S&P 500	4.89
Company Name 15	Stock-Ticker-15	09/25/2019	10/02/2019	None	S&P 500	6.03
Company Name 16	Stock-Ticker-16	11/27/2019	12/04/2019	S&P MIDCAP 400	S&P 500	2
Company Name 17	Stock-Ticker-17	12/01/2019	12/08/2019	S&P MIDCAP 400	S&P 500	1.05
Company Name 18	Stock-Ticker-18	12/13/2019	12/23/2019	S&P MIDCAP 400	S&P 500	3.84
Company Name 19	Stock-Ticker-19	12/13/2019	12/23/2019	S&P MIDCAP 400	S&P 500	1.29
Company Name 20	Stock-Ticker-20	01/21/2020	01/27/2020	None	S&P 500	5.9
Company Name 21	Stock-Ticker-21	05/05/2020	05/11/2020	S&P MIDCAP 400	S&P 500	3.07
Company Name 22	Stock-Ticker-22	05/05/2020	05/11/2020	None	S&P 500	11.31
Company Name 23	Stock-Ticker-23	05/17/2020	05/21/2020	S&P MIDCAP 400	S&P 500	1.2
Company Name 24	Stock-Ticker-24	06/11/2020	06/21/2020	S&P MIDCAP 400	S&P 500	0.09
Company Name 25	Stock-Ticker-25	09/03/2020	09/20/2020	S&P MIDCAP 400	S&P 500	9.03
Company Name 26	Stock-Ticker-26	09/03/2020	09/20/2020	S&P MIDCAP 400	S&P 500	5.31
Company Name 27	Stock-Ticker-27	09/30/2020	10/06/2020	S&P MIDCAP 400	S&P 500	0.9
Tesla	TSLA	11/16/2020	12/21/2020	None	S&P 500	14.57
Company Name 29	Stock-Ticker-29	12/30/2020	01/06/2021	S&P MIDCAP 400	S&P 500	8.23
Company Name 30	Stock-Ticker-30	01/14/2021	01/20/2021	S&P MIDCAP 400	S&P 500	4.73
Company Name 31	Stock-Ticker-31	02/07/2021	02/11/2021	S&P MIDCAP 400	S&P 500	5.36
Company Name 32	Stock-Ticker-32	03/11/2021	03/21/2021	S&P MIDCAP 400	S&P 500	6.97
Company Name 33	Stock-Ticker-33	03/11/2021	03/21/2021	S&P MIDCAP 400	S&P 500	2.88
Company Name 34	Stock-Ticker-34	03/11/2021	03/21/2021	S&P MIDCAP 400	S&P 500	8.85
Company Name 35	Stock-Ticker-35	03/11/2021	03/21/2021	None	S&P 500	8.61
Company Name 36	Stock-Ticker-36	04/14/2021	04/19/2021	S&P MIDCAP 400	S&P 500	4.39
Company Name 37	Stock-Ticker-37	05/09/2021	05/13/2021	S&P MIDCAP 400	S&P 500	0.91
Company Name 38	Stock-Ticker-38	05/26/2021	06/02/2021	None	S&P 500	3.8
Moderna	MRNA	07/14/2021	07/20/2021	None	S&P 500	10.89
Company Name 39	Stock-Ticker-39	05/26/2021	08/29/2021	S&P MIDCAP 400	S&P 500	2.09
Company Name 40	Stock-Ticker-40	09/02/2021	09/19/2021	S&P MIDCAP 400	S&P 500	3.27
Company Name 41	Stock-Ticker-41	12/06/2021	12/14/2021	None	S&P 500	17.22
Company Name 42	Stock-Ticker-42	12/02/2021	12/20/2021	S&P MIDCAP 400	S&P 500	4.87
Company Name 43	Stock-Ticker-43	12/02/2021	12/20/2021	S&P MIDCAP 400	S&P 500	2.38
Company Name 44	Stock-Ticker-44	12/02/2021	12/20/2021	S&P MIDCAP 400	S&P 500	0.03
Company Name 45	Stock-Ticker-45	02/09/2022	02/14/2022	None	S&P 500	4.53
Company Name 46	Stock-Ticker-46	02/24/2022	03/01/2022	None	S&P 500	0
Company Name 47	Stock-Ticker-47	03/28/2022	04/03/2022	None	S&P 500	2.37
Company Name 48	Stock-Ticker-48	06/02/2022	06/07/2022	None	S&P 500	8.58
Company Name 49	Stock-Ticker-49	06/02/2022	06/20/2022	None	S&P 500	9.82
Company Name 50	Stock-Ticker-50	06/02/2022	06/20/2022	None	S&P 500	7.78
Company Name 51	Stock-Ticker-51	09/01/2022	09/18/2022	None	S&P 500	7.39
Company Name 52	Stock-Ticker-52	09/01/2022	09/18/2022	None	S&P 500	9.48
Company Name 53	Stock-Ticker-53	09/22/2022	10/02/2022	S&P 500	S&P 500	1.67
Company Name 54	Stock-Ticker-54	09/22/2022	10/02/2022	S&P 500	S&P 500	5.43
Company Name 55	Stock-Ticker-55	10/05/2022	10/12/2022	None	S&P 500	2.1
Company Name 56	Stock-Ticker-56	10/27/2022	10/31/2022	None	S&P 500	9.74
Company Name 57	Stock-Ticker-57	12/12/2022	12/19/2022	None	S&P 500	6.78
Company Name 58	Stock-Ticker-58	12/19/2022	12/22/2022	S&P MIDCAP 400	S&P 500	4.85
Company Name 59	Stock-Ticker-59	12/28/2022	01/03/2023	None	S&P 500	1.45
Company Name 60	Stock-Ticker-60	03/09/2023	03/14/2023	None	S&P 500	8.6
Bunge	BG	03/12/2023	03/14/2023	None	S&P 500	16.29
Company Name 62	Stock-Ticker-62	03/02/2023	03/19/2023	S&P MIDCAP 400	S&P 500	3.06
Company Name 63	Stock-Ticker-63	04/30/2023	05/03/2023	S&P MIDCAP 400	S&P 500	3.2
Company Name 64	Stock-Ticker-64	06/01/2023	06/18/2023	None	S&P 500	6.54
Company Name 65	Stock-Ticker-65	08/08/2023	08/24/2023	None	S&P 500	9.23
Company Name 66	Stock-Ticker-66	08/31/2023	09/17/2023	None	S&P 500	3.96
Company Name 67	Stock-Ticker-67	08/31/2023	09/17/2023	None	S&P 500	8.65
Company Name 68	Stock-Ticker-68	10/13/2023	10/18/2023	None	S&P 500	9.09
Company Name 69	Stock-Ticker-69	10/13/2023	10/18/2023	None	S&P 500	5.61
Company Name 70	Stock-Ticker-70	11/30/2023	12/18/2023	None	S&P 500	8.13
Company Name 71	Stock-Ticker-71	11/30/2023	12/18/2023	S&P MIDCAP 400	S&P 500	4.1
Company Name 72	Stock-Ticker-72	11/30/2023	12/18/2023	S&P MIDCAP 400	S&P 500	4.52
Company Name 73	Stock-Ticker-73	02/29/2024	03/17/2024	S&P MIDCAP 400	S&P 500	27.56
Company Name 74	Stock-Ticker-74	02/29/2024	03/17/2024	S&P MIDCAP 400	S&P 500	7.34
Company Name 75	Stock-Ticker-75	03/26/2024	03/31/2024	None	S&P 500	5.69
Company Name 76	Stock-Ticker-76	05/02/2024	05/07/2024	None	S&P 500	6.34
Company Name 77	Stock-Ticker-77	06/06/2024	06/23/2024	None	S&P 500	11.39
Company Name 78	Stock-Ticker-78	06/06/2024	06/23/2024	None	S&P 500	10.56
Company Name 79	Stock-Ticker-79	06/06/2024	06/23/2024	S&P MIDCAP 400	S&P 500	5.8
Company Name 80	Stock-Ticker-80	09/05/2024	09/22/2024	None	S&P 500	14.76
Company Name 81	Stock-Ticker-81	09/05/2024	09/22/2024	None	S&P 500	10.49
Company Name 82	Stock-Ticker-82	09/05/2024	09/22/2024	S&P MIDCAP 400	S&P 500	7.26
Company Name 83	Stock-Ticker-83	09/23/2024	09/29/2024	None	S&P 500	3.23
Company Name 84	Stock-Ticker-84	11/21/2024	11/26/2024	S&P MIDCAP 400	S&P 500	17.41
Company Name 85	Stock-Ticker-85	12/18/2024	12/23/2024	S&P MIDCAP 400	S&P 500	1.14
Company Name 86	Stock-Ticker-86	12/05/2024	12/23/2024	None	S&P 500	9.35
Company Name 87	Stock-Ticker-87	12/05/2024	12/23/2024	None	S&P 500	6.59
Company Name 88	Stock-Ticker-88	03/06/2025	03/23/2025	None	S&P 500	9.42
Company Name 89	Stock-Ticker-89	03/06/2025	03/23/2025	S&P MIDCAP 400	S&P 500	5.05
Company Name 90	Stock-Ticker-90	03/06/2025	03/23/2025	S&P MIDCAP 400	S&P 500	2.19
Company Name 91	Stock-Ticker-91	03/06/2025	03/23/2025	S&P MIDCAP 400	S&P 500	3.59
Coinbase Global	COIN	05/11/2025	05/18/2025	None	S&P 500	25.59
Datadog	DDOG	07/01/2025	07/08/2025	None	S&P 500	16.08
The Trade Desk	TTD	07/13/2025	07/17/2025	None	S&P 500	15.94
Block	XYZ	07/17/2025	07/22/2025	None	S&P 500	11.76
					Total % Return	612.02
					Average % Return	6.38

% Change by Next Day Close = % Change [ Maximum of [High Price between Announce Date_17:15 hrs EST & Announce Date+1_19:59 hrs EST] / Minimum of [Low Price on Announce Date betw 17:15 & 17:20 hrs EST] ]

Average 6.4% Return from Stocks Added to S&P500 between 2018-Sept to 2025-Aug

An average 6.4% price swing per stock in just over a day — compounded across 96 additions to the S&P 500 between September 2018 and August 2025 — translates into a jaw-dropping 612% cumulative return. To put that in perspective, the S&P 500 index itself returned only about 150% over the same period, and even Warren Buffett’s Berkshire Hathaway — the gold standard of long-term investing — delivered far less. Achieving 612% in seven years isn’t just beating the market; it’s multiplying it several times over. In a world where fund managers celebrate a few percentage points of annual “alpha,” these index-inclusion surges reveal a rare, structural opportunity that has outperformed virtually every conventional benchmark by a wide margin.

Based on analysis of 96 stocks that were added to S&P500 Index between September-2018 and August-2025, we found that the these stocks underwent a price change of 6.4% - from the “minimum price during the first five minutes after announcement of addition to index” to the “maximum price reached by the end of next trading day(after hours trading)”. The total return from this price swing of these 96 stocks was 612%.

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Return from Stocks Added to S&P500:2021Dec to 2024-Sept

Our research indicates - buying a stock that gets added to S&P500 Index, within a few minutes of the announcement and selling it by market-open on next day has returned about 3% for the investors, during the period from 2021 December to 2024 September.

An analysis of 40 stocks added to S&P500 Index during the period between 2021-December to 2024-September shows the following: Buying these stocks within about 5 minutes of the announcement of addition and selling by next-day open of markets provided a return of about 3% per stock.

The table here shows the return from "Closing Price" on Announcement-Day to "Open Price" on "Next Day".