It has been just over two years since Bluebird Bio (NASDAQ: BLUE) split into two separate companies. One focused on gene therapies and retained the Bluebird name; another focused on oncology, and now goes under the name 2seventy Bio. Below, I'll look at what your returns would look like if you invested $10,000 in Bluebird Bio after the split.

On Nov. 5, 2021, after the split was complete, shares of Bluebird were trading at around $13. If you'd invested $10,000 into the business at that point and bought at that price, you'd own 769 shares. The timing of the purchase, however, would have been unfortunate: it would have taken place as growth stocks as a whole were starting to come down in value.

Shares of Bluebird have been volatile of late, but they currently trade at around $2.50. That would put the value of those 769 shares at less than $2,000, for a decline of over 80%. To say it hasn't been a good investment would be a vast understatement. While the S&P 500 hasn't exactly been a great investment over that period, it's at least in positive territory -- up around 2%.

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Source Fool.com