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A comment on The math’s not pretty on digital advertising’s future revenues? (2017). Parent comment

Re:The math’s not pretty on digital advertising’s future rev... by monochromatic on Saturday December 29, 2018 @07:02PM (#18786463)
Short selling. But be careful with margin calls.
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Re:The math’s not pretty on digital advertising’s future rev... by whatshisface on Saturday December 29, 2018 @07:46PM (#18786636)
Shorting has a specific delivery date, which is different from holding stock because you can choose when to sell it.
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Re:The math’s not pretty on digital advertising’s future rev... by monochromatic on Saturday December 29, 2018 @09:32PM (#18786999)
I don’t believe that’s right.
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