The Oxford study has 2 problems. First, it uses a high estimate of high job loss. More realistic estimates are in the 10-14% range. Second, it repeats the Luddite fallacy that these jobs will be lost permanently or replaced by lower-wage jobs. More likely, new higher-wage jobs will be created. What those jobs will be, we can't predict.
As for high-frequency, algorithmic trading, that actually destroys value by increasing volatility. It's becoming more likely that a small transaction tax on stocks and options will be introduced that will make it unprofitable without significantly harming regular traders.
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Dear @rufusfirefly
Very wise words!
Thank you again for your super-valuable feedback. I absolutely love reading your comments!
Yours
Piotr