Fidelity is writing down its Twitter investment—will Sequoia and a16z be next?

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When Elon Musk took Twitter private late last year, he did so with the help of a handful of investors, at least one of which appears to have skimped on due diligence.

Now we’re getting an idea of whether that buyout deal for the social media company was a good investment—at least according to one of Twitter’s shareholders. As my colleague Luisa Beltran reported earlier this week, one of Fidelity’s growth stock-focused mutual funds, the Fidelity Blue Chip Growth Fund, wrote down its stake in Twitter by approximately 56% since October—downgrading the value of its holdings from $19.7 million at the end of October to $8.6 million as of Nov. 30.