Higher rates on capital gains and dividend income More troubling is the proposal to raise taxes on the income that's most important for stock investors: dividends and capital gains. The current 15% rate could rise to 20%-25% or even higher -- and the fear of that hike may bring an avalanche of year-end selling. Say, for instance, you own some stocks with nice gains, and you expect to sell them within the next few years in a taxable account. Look what happens if you wait to sell until a higher tax rate comes into effect: Source: Yahoo Finance. As of Sept. 8. Assumes $10,000 investment in each stock and tax rate increase to 20-25%.Stock Stock 5-Year Average Annual Return Current Gain on $10,000 Investment in 2003 Tax If Sell Now Tax If Sell At Higher Tax Rate Halliburton (NYSE: HAL ) 26.7% $22,709 $3,406 $4,542-$5,677 Potash Corp. (NYSE: POT ) 67.6% $122,181 $18,327 $24,436-$30,545 Apple (Nasdaq: AAPL ) 69.8% $131,126 $19,669 $26,225-$32,782 Amazon.com (Nasdaq: AMZN ) 11.7% $7,386 $1...