We develop an optimal tax-timing model that takes into account asymmetric long-term and short-term tax rates for positive capital gains and limited tax deductibility of capital losses. In contrast to the existing literature, this model can help explain why many investors not only defer short-term capital losses to long term but also defer large long-term capital gains and losses. Because the benefit of tax deductibility of capital losses increases with the short-term tax rates, effective tax rates can decrease as short-term capital gains tax rates increase.

We examine the impact of competition on bank earnings persistence by exploiting a natural experiment following interstate banking deregulation that increased bank competition. We find that bank earnings adjustment speed increases after their states implement the deregulation. This relationship is weakened, however, with the increase of bank's abilities to sustain earnings, as reflected in size, diversification, managerial efficiency and safety. We further find that the impact of compeititon on bank earnings adjustment speed is direct but not indirectly through the channel of earnings management.

Using a unique proprietary dataset of daily mutual fund trading records and the COVID-19 pandemic-triggered lockdown in Wuhan (China) as a natural experiment, we find that individual mutual fund investors in Wuhan significantly reduced their daily trading frequency, total investment of their portfolios, and risk level of their invested funds during the lockdown period as compared to investors in other cities. The results suggest that the elimination of face-to-face interaction among individual investors during the lockdown reduced their information sharing, which led to more conservatism in their financial trading. We rule out alternative explanations of salience bias due to limited investor attention and temporary changes in personal circumstances such as depression and/or income reduction, during the lockdown period. Finally, consistent with the theory of naïve investor trading, we also find that investors received higher trading returns during the lockdown as they reduced trading aggressively in the absence of face-to-face interactions.

This paper examines the intensity of competition in 65 national banking industries. Country-level dynamic panel estimates of the persistence of bank profit are reported and compared. Persistence of bank profit is interpreted as an indicator of the intensity of competition, and as such is found to be consistent with traditional structure-based and conduct-based competition indicators. Persistence is negatively related to the rate of growth in GDP per capita, and positively related to the size of entry barriers. Persistence tends to be weaker, and competition stronger, in countries where institutional development is more advanced and external governance mechanisms are strong.