Luke Bouffler, Amy Kwan, Lantian Liang, Richard Philip
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Do uninformed traders move prices? Evidence from the Bank of Japan's ETF purchasing program
Using the Bank of Japan (BoJ) ETF purchasing program as an exogenous shock to stock demand, we find that stocks with a higher BoJ demand experience higher positive abnormal returns on BoJ ETF purchase dates, which only partially revert in the long term. Our findings support the hypothesis that stocks have a downward-sloping demand curve, implying that uninformed traders can cause a permanent shift in price.
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