Covid-19 and share prices

From The Daily Mail:

'Stay at home' stocks Zoom, Amazon and Netflix all plunge after Pfizer announces its COVID-19 vaccine is 90% effective
* Zoom shares dropped by 15 percent in pre-market trading on Monday
* The video calling company saw a boost in March when millions of businesses switched to working-from-home
* Amazon and Netflix also saw jumps in their share prices at the start of the second quarter
* They also suffered on Monday while Pfizer's stock went up by 14.5 percent

Those bullet points sum up pretty much all you need to know. I assume that the share price of oil companies will also increase if the vaccine promises to be effective; petrol went down a couple of pence/litre after Lockdown 2.0 kicked in.

And, if you love a right-wing conspiracy theory, you can assume that Pfizer waited until it was fairly certain that Biden would win the election before they announced that their vaccine appears to work. If the vaccine actually works and it all goes live next year, Biden will take all the credit*. It would have really helped Trump if Pfizer had announced this a couple of weeks before the election. I've checked Twitter, and the usual loons are saying that Pfizer was getting revenge on Trump for this suggestion and/or that Bill Gates and George Soros own Pfizer and just wanted Trump out and 'their man' in.

* Like Ken Livingstone, who introduced hire bikes in London shortly before the end of his second term as London Mayor, His successor Boris Johnson expanded the scheme and persuaded people to call them 'Boris Bikes'.