"Release" in this market means a formal unveiling of its capabilities. If Google/deepmind give a public presentation of its capabilities, but don't grant the general public access, this will still count as a release. Leaks, rumors, or other unofficial unveilings of capabilities will not count as a release. My goal is to measure whether investors are excited or disappointed by what they see.

For simplicity, I will go by calendar dates rather than trading days. If a presentation occurs at 6pm on Wednesday, January 10th, I will close this market after the market closes on Wednesday, January 24th.

To avoid ambiguity, as a starting point I will use the closing price from the most recent full day of trading in which Gemini was not unveiled. So, if it is unveiled at 6pm (after market close), I will use the same day's closing price from 4pm. If it is unveiled at 2pm though (during trading hours) I will use the previous day's closing price as a reference point.