Abstract
This paper investigates the dynamics of individual portfolios in a unique dataset containing the disaggregated wealth and income of all households in Sweden. Between 1999 and 2002, stockmarket participation slightly increased but the average share of risky assets in the financial portfolio of participants fell moderately, implying little aggregate rebalancing in response to the decline in risky asset prices during this period. We show that these aggregate results conceal strong household-level evidence of active rebalancing, which on average offsets about one half of idiosyncratic passive variations in the risky asset share. Sophisticated households with greater education, wealth, and income, and holding better diversified portfolios, tend to rebalance more aggressively. We also study the decisions to enter and exit risky financial markets. More sophisticated households are more likely to enter, and less likely to exit. Portfolio characteristics and performance also influence exit decisions. Households with poorly diversified portfolios and poor returns on their mutual funds are more likely to exit; however, consistent with the literature on the disposition effect, households with poor returns on their directly held stocks are less likely to exit.
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