During periods of low interest rates, income generated from dividends becomes more attractive to investors seeking safer places to park their investments. Dividend mutual funds and exchange-traded funds are advantageous in this environment. As the yield from bonds remains extremely low, dividend-producing stocks offer alternatives to investing in cash generating securities, says Derek Horstmeyer, a finance professor at George Mason University. The addition of dividend funds to a portfolio could give investors some downside protection since valuations in the stock market remain very high, he says. Here are six high-dividend mutual funds and ETFs to consider for your portfolio.