As the stock market's period of slow growth drags on, many investors have become frustrated by the lack of portfolio returns.But there's a sensible, conservative way to potentially add a bit more to returns. It's known as a covered-call strategy, and it has been effective for us at Steel Peak. The most straightforward covered-call strategy is to enter into a contract with another party to sell shares of a stock you own at a predetermined "strike" price.In exchange for agreeing to potentially sell the stock, you are paid a premium. And over time, these premiums can produce a meaningful amount of income for your portfolio. The strategy can be particularly effective when markets are flat or falling.read more