A major advantage of indexing is that index funds are tax efficient. Actively managed funds can create large tax liabilities if you hold them outside your tax-advantaged retirement plans. To the extent that your funds generate capital gains from their portfolio turnover, this active trading creates taxable income for you. And short-term capital gains are taxed at ordinary income tax rates that can go well over 50 percent when state income taxes are considered. Index funds, in contrast, are long-term buy-and-hold investors and typically do not generate significant capital gains or taxable income. To