Addition of a Stock to S&P Index leads to increase in its price within minutes of Announcement
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About 3% Average Return for "less than one-day" holding-period of Stocks Added to S&P Indexes
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One such strategy is "Index Effect" - When a stock is added to the S&P 500, it generally experiences a positive price movement. This is because index funds and ETFs that track the S&P Index (S&P500, S&P400, S&P600) are compelled to buy shares of the newly added company.
On average, the price of stocks added to S&P index increases by about 3% within minutes or hours of announcement or within a day of announcement.
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Our flagship product is Alerts (Phone Calls) for stocks that get added to S&P Indexes. Within minutes of the announcement to add a stock to S&P Indexes ( S&P500 or S&P400 or S&P600 indexes), you can get a call on your phone and an email that provides the exact stock that was added to the index. By buying the stock within minutes of announcement and selling it after a few hours or on next day, one can expect to gain about 3% return (on average) - this is based on analysis of data for about 100 stocks that were added to S&P500 or S&P400 or S&P600 indexes, during a four-year period between 2021 and 2025. This trading strategy offers the potential to make substantial gains, if executed appropriately & consistently, over a long period. Continue reading to learn more.
01
Coinbase(COIN): Stock Price increased by 25% by End of Next Day, after announcement to add to S&P500 Index
On 12th May, 2025, Coinbase stock was added to the S&P 500 Index.
Within a few minutes of the announcement that the stock will be added to the S&P 500 Index, the price of the stock increased.
By the close of the after-market trading at 8pm EST, the “closing price” of Coinbase(COIN) stock increased by about 7%.
By the Next Day Open, the “closing price” of Coinbase(COIN) stock increased by 10% above the “close price on announcement day” .
By the Next Day close of the after-market trading at 8pm EST, the “closing price” of Coinbase(COIN) stock increased by about 20%.
Above chart shows the price changes, minutes after the announcement.
Chart 01: CoinBase
02
Bunge (BG): Stock gave a return of about 7% to 9% in one day, if bought within 5 minutes of announcement to add to S&P500
Buying the Bunge(BG) stock within about 5 minutes of the “announcement to add to S&P 500” gave a return of about 7% to 9%, for a holding period of about one-day (depending on the time of selling).
On 13th March, 2023, Bunge(BG) stock was added to the S&P 500 Index.
Within a few (about 5) minutes of the announcement that the stock will be added to the S&P 500 Index, the price of the stock increased by about 5%.
By the close of the after-market trading at 8pm EST, the “closing price” of Bunge(BG) stock increased by about 7.8% above the "Open Price" at time of announcement
By the Next Day Market Open, the “closing price” of Bunge(BG) stock increased by 8.4 % above the "Open Price" at time of announcement.
By the Next Day close of the after-market trading at 8pm EST, the “closing price” of Bunge(BG) stock increased by 12% above the "Open Price" at time of announcement.
The maximum price during the next day was about 14% above the "Open Price" at time of announcement.
The above graph shows the price changes, minutes after the announcement.
Chart 02: Bunge(BG)
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I have been a subscriber of the stock alerts from beststockinsight.com since early 2025. I started with a 2000$ positions in stocks when they were added to S&P indexes. I kept watching and learning more about the behavior of these stocks. As I gained confidence in this strategy, I gradually increased my position size, as I saw the profits ( and some occasional losses). I went through the research posted on beststockinsight.com and also did my own research. My best position was Coinbase, where I made a profit of more than $18,000 in one day, after buying the stock on getting the Announcement alert on 12th May 2025
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