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A comment on Reddit’s profane, greedy traders are shaking up the stock market. Parent comment

Re:Reddit’s profane, greedy traders are shaking up the stock... by Majromax on Wednesday February 26, 2020 @02:44PM (#22426526)
While amusing as hell, the answer to the question posed by that XKCD is 'yes'. It's trivial to give away arbitrage opportunities, so the average expected loss – especially net of transaction fees – can be substantial.
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Re:Reddit’s profane, greedy traders are shaking up the stock... by titanomachy on Wednesday February 26, 2020 @10:41PM (#22430217)
That can't be done just by buying shares at market price, right? Would require some combination of options or short sells. Or setting stops on a highly volatile stock in a way that basically guarantees you lose money.
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Re:Reddit’s profane, greedy traders are shaking up the stock... by Majromax on Wednesday February 26, 2020 @10:58PM (#22430313)
Given buy/sell spreads, you can lose arbitrary amounts of money simply by buying and selling the same stock hundreds of times.
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