The Best Yielding Service Stocks With Highest Expected Growth Researched by Dividend Yield - Stock, Capital, Investment. The service sector is, after agriculture and industrials, the tertiary production level of an industrialized economy. The sector has a total market capitalization of USD 34.86 trillion and includes 907 companies. The average stock from the sector pays 1.58 percent in dividends and is currently valuated with a P/E ratio of 20.64.