Moreover, DIA is trading at an attractively valued 16.5 price-to-earnings ratio. In contrast, the S&P 500 index shows a 18.4 P/E ratio.
There are also a number of other broad mega-cap ETF options available, including the Vanguard Mega Cap ETF (NYSEArca: MGC), iShares S&P 100 ETF (NYSEArca: OEF) and Guggenheim Russell Top 50 Mega Cap ETF (NYSEArca: XLG).
The three ETFs target some of the largest U.S. companies on the market. MGC includes 59.2% mega-caps and 38.3% large-caps. OEF holds 83.5% mega-caps and 16.5% large-caps. XLG has 98.5% mega-caps and 1.5% large-caps.
For more information on the largest U.S. companies, visit our mega-cap category.
Max Chen contributed to this article.