The energy sector can be a great place for income investors to find higher-yielding options. The average energy stock in the S&P 500 has a yield of around 3% at its current share price, which is more than double the 1.3% yield of the broad market index. Many energy stocks have even higher yields. One of them is MPLX (MPLX -0.08%). The midstream energy company yields more than 7% right now. Here's why income investors will want to take a closer look at MPLX. A high-quality, high-yielding payoutA yield above ...