What a difference a day makes: markets react to PacBio's new sequencing platform

Daily change in share price at close of trade on October 1st, 2015:

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Figures from Google Finance

Update: Earlier version of this figure incorrectly cited a 19% drop in Illumina's share price. My bad: -18.6 was the price change in dollars, not the percentage change.

Financial disclaimer: I do not own shares in any biotechnology company.