Launched on 03/01/2006, the Invesco S&P 500 Pure Growth ETF (RPG) is a passively managed exchange traded fund designed to provide a broad exposure to the Large Cap Growth segment of the US equity market.The fund is sponsored by Invesco. It has amassed assets over $2.28 billion, making it one of the average sized ETFs attempting to match the Large Cap Growth segment of the US equity market.Why Large Cap GrowthLarge cap companies usually have a market capitalization above $10 billion. They tend to be stable companies with predictable cash flows and are usually less volatile than mid and small cap companies.Growth stocks have higher than average sales and earnings growth rates. While these are expected to grow faster than the broader market, they also have higher valuations. Additionally, growth stocks have a greater level of risk associated with them. They are likely to outperform value stocks in strong bull markets but over the longer-term, value stocks have delivered better returns than growth stocks in almost all markets.CostsExpense ratios are an important factor in the return of an ETF and in the long term, cheaper funds can significantly outperform their more expensive counterparts, other things remaining the same.Annual operating expenses for this ETF are 0.35%, putting it on par with most peer products in the space.It has a 12-month trailing dividend yield of 0.47%.Sector Exposure and Top HoldingsEven though ETFs offer diversified exposure which minimizes single stock risk, it is still important to look into a fund's holdings before investing. Luckily, most ETFs are very transparent products that disclose their holdings on a daily basis.This ETF has heaviest allocation to the Information Technology sector--about 37.60% of the portfolio. Healthcare and Consumer Discretionary round out the top three.Looking at individual holdings, Nrg Energy Inc (NRG) accounts for about 3.70% of total assets, followed by Fortinet Inc (FTNT) and Enphase Energy Inc (ENPH).The top 10 holdings account for about 28.5% of total assets under management.Performance and RiskRPG seeks to match the performance of the S&P 500 Pure Growth Index before fees and expenses. The S&P 500 Pure Growth Index measures the performance of securities that exhibit strong growth characteristics in the S&P 500 Index.The ETF has lost about -25.98% so far this year and is down about -21.61% in the last one year (as of 09/21/2022). In the past 52-week period, it has traded between $142.53 and $220.95.The ETF has a beta of 1.16 and standard deviation of 29.67% for the trailing three-year period, making it a medium risk choice in the space. With about 59 holdings, it effectively diversifies company-specific risk.AlternativesInvesco S&P 500 Pure Growth ETF holds a Zacks ETF Rank of 2 (Buy), which is based on expected asset class return, expense ratio, and momentum, among other factors. Because of this, RPG is an excellent option for investors seeking exposure to the Style Box - Large Cap Growth segment of the market. There are other additional ETFs in the space that investors could consider as well.The Vanguard Growth ETF (VUG) and the Invesco QQQ (QQQ) track a similar index. While Vanguard Growth ETF has $71.87 billion in assets, Invesco QQQ has $157.63 billion. VUG has an expense ratio of 0.04% and QQQ charges 0.20%.Bottom-LineAn increasingly popular option among retail and institutional investors, passively managed ETFs offer low costs, transparency, flexibility, and tax efficiency; they are also excellent vehicles for long term investors.To learn more about this product and other ETFs, screen for products that match your investment objectives and read articles on latest developments in the ETF investing universe, please visit Zacks ETF Center. Want key ETF info delivered straight to your inbox? Zacks’ free Fund Newsletter will brief you on top news and analysis, as well as top-performing ETFs, each week.Get it free >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Invesco S&P 500 Pure Growth ETF (RPG): ETF Research Reports NRG Energy, Inc. (NRG): Free Stock Analysis Report Invesco QQQ (QQQ): ETF Research Reports Fortinet, Inc. (FTNT): Free Stock Analysis Report Enphase Energy, Inc. (ENPH): Free Stock Analysis Report Vanguard Growth ETF (VUG): ETF Research Reports To read this article on Zacks.com click here. Zacks Investment Research