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Apr 30, 2021 12:09PM Ballard Power (BLDP) 30-day option implied volatility at 71 into quarter results and outlook

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Dec 23, 2020 10:34AM Ballard Power (BLDP) call put ratio 10.8 calls to 1 put with focus on January 22 calls

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Sep 21, 2020 10:32AM Ballard Power (BLDP) call put ratio 13.7 calls to 1 put with focus on November 17 and 18 calls

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Nov 19, 2019 10:06AM Ballard Power (BLDP) option implied volatility at low end of range

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