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You have noticed that stocks have a tendency to go down after days when coronavirus cases increase and vice versa. If you can make abnormal

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You have noticed that stocks have a tendency to go down after days when coronavirus cases increase and vice versa. If you can make abnormal returns following this trading strategy, does this violate market efficiency? Yes, it violates weak efficiency. Yes, it violates semi-strong efficiency. Yes, it violates strong efficiency. No, it does not violate efficiency

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