This ETF offers low cost exposure to the U.S. tech sector, making it one of many options available to investors seeking to access an industry that is capable of remarkable rallies and steep declines over short periods of time. Given the sector-specific focus, IYW is probably too granular for those building a long-term, buy-and-hold portfolio, but can be useful for investors putting on a tactical tilt or looking to beef up tech sector exposure. IYW's primary appeal is its decent scope in holdings-- the fund has more than 150 securities in total-- and the fund's liquid nature' it trades roughly 200,000 shares a day and has more than $1.5 billion in assets. However, it should be noted that typical tech giants such as Apple, IBM, and Microsoft dominate the top of the list of holdings and may already be found in large quantities in other parts of an investor's portfolio. VGT and XLK offer generally similar exposure, while the equal-weighted RYT gives investors an option that will be more balanced in nature and avoid concentrations in a small handful of tech giants.