If you are looking for large companies with attractive yields, this trio of S&P 500 stocks offers yields over 4%. The S&P 500 Index is currently yielding a scant 1.3% or so. That's a very low number, but you can do much better if you dig into the index and cherry pick good companies with relatively high yields. Three stocks that should be on your list as potential long-term holdings are UDR (UDR 0.93%), T. Rowe Price (TROW -0.37%), and Realty Income (O 0.28%). Here's why. UDR provides homes, a basic necessi ...