
doi: 10.2139/ssrn.2476267
Rational bubbles in stocks can cause increases in trading volume, even after accounting for their expansionary effect on output and consumption. Trading volume increases are not caused by speculation driven by differences in beliefs. Dividend-bearing assets used to transfer resources intertemporally reduce the need for portfolio rebalancing after a bad shock. Bubbles, on the contrary, do not produce dividends and require more rebalancing after a bad shock.
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