As of March 31, 2020, no market capitalization milestones have been achieved and consequently, no shares subject to the 2018 CEO Performance Award have vested as of the date of this filing. However, if the value of Tesla’s closing stock price continues near or higher than the levels seen in late April 2020, the first market capitalization milestone of $100 billion is expected to be met during the second quarter of 2020. In such event, subject to certification by our Board of Directors, the first tranche under the 2018 CEO Performance Award would vest.
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If the first tranche under the 2018 CEO Performance Award vests during the second quarter of 2020 as currently expected, the remaining unamortized expense of $22 million for that tranche, which was expected to be recognized in the third quarter of 2020 as determined on the grant date, would be accelerated into the second quarter of 2020.
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For the three months ended March 31, 2020 and 2019, we recorded stock-based compensation expense of $66 million and $55 million, respectively, related to the 2018 CEO Performance Award.