Tesla Stock will be added to the S&P 500 all at once. Expect volatility tomorrow.

Tesla Bulls received more good news on Monday evening. Tesla will enter the S&P 500 all at once, at full weight, on December 21. Investors should expect larger movements in the stock, both up and down, in the coming days.

Tesla (ticker: TSLA) is the most valuable company ever added to the S&P 500. This creates a unique problem for S&P 500 index funds. They have an unusually large amount of stocks to buy due to the massive market cap of 538 billion dollars from Tesla.

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