Vanguard Mega Cap Index Fund ETF Shares MGC

Vanguard Mega Cap holds the largest US stocks and charges a low fee, making it a solid choice for US large-cap investors.

The fund replicates the CRSP US Mega Cap Index, which captures the largest 70% of the US stock market. The portfolio weights stocks by market cap, a sensible choice for a large-blend fund. This approach harnesses the market’s collective wisdom on each stock’s relative value. Stocks in highly traded markets, like the US large-cap stock market, reflect new information quickly and work well for indexing. That’s why large-blend index funds have outperformed their actively managed peers on average over the long run.

This portfolio sports much lower turnover than its peers in the large-blend Morningstar Category, owing to its market-cap-weighted approach. Index buffer rules also help reduce unnecessary turnover and trading costs, which come directly out of returns.

Since the portfolio holds only very large stocks, it’s not as diversified as other index funds that hold mid- and small-cap stocks. However, its 175 stock holdings still outnumber many actively managed peers that tend to have narrower portfolios. The portfolio also holds slightly less in its top 10 holdings, stowing 44% of assets there compared with the category norm’s 52%. The fund’s concentration has increased in recent years, but that’s indicative of the overall US stock market, not a fault in design.

The fund’s average market cap ranks as one of the largest in the large-blend category owing to its mega-cap focus, but it looks like its average peer along other dimensions. Its value-growth orientation lines up closely with peers. Sector allocations typically fall in line with peers, too. Technology represents the widest rift from the average, constituting 37% of this portfolio but just 32% of the category average as of March 2026. Avoiding style or sector bets allows the fund’s low fee to carve a long-term advantage.

Outstanding performance of some of the portfolio’s largest stocks meant that the exchange-traded fund share class outperformed its average peer by 2.68 percentage points over the 10 years through March 2026. The fund holds little cash, which should help it outperform cash-saddled peers during market rallies but hurt when the stock market declines. This fund does not hold mid- or small-cap stocks and will miss out if they outperform large-cap stocks.

Morningstar acquired the Center for Research in Security Prices, the provider of the index tracked by this fund, in February 2026. Morningstar analysts work independently from the index business, and the Morningstar Medalist Ratings for funds tracking CRSP indexes are based solely on the fund's investment merits. Analysts do not provide qualitative ratings or opinions for investments managed by Morningstar or managed investments that track Morningstar indexes that incorporate discretionary inputs assigned by Morningstar employees on an ongoing basis, such as Morningstar Economic Moat Ratings or ESG Risk Ratings.

Vanguard Mega Cap targets some of the market’s most established companies, using market-cap weighting to harness the wisdom of crowds. This straightforward approach earns it an Above Average Process rating.

The fund tracks the CRSP US Mega Cap Index, which sweeps in the largest 70% of the US market and weights stocks by their market cap. Stocks must be easy to trade to join and remain in the index. The index reconstitutes quarterly and implements buffers for stocks on the borderline to prevent unnecessary trading.

Market-cap weighting is a sensible approach for the large-blend category. Large, highly traded stocks usually reflect new information quickly, and market-cap weighting requires very low trading costs. It follows the wisdom of crowds and takes the guesswork out of stock selection. The US stock market has historically gained more than it’s lost, and buying the biggest stocks in the market allows investors to capitalize on that performance.

The index only holds large-cap stocks, most of which are mature businesses that have strong industry footholds. Many of its top holdings are companies with diverse product lines, and nearly the entire portfolio earns either wide or narrow Morningstar Economic Moat Ratings. While it holds fewer stocks than broader market indexes, such as the CRSP US Total Market Index, it’s slightly more diversified than the large-blend category average. It tallies 40 more holdings than the category average, and its 44% weight in its top 10 holdings was 8 percentage points lower than peers, as of March 2026.

The index has become more concentrated over the past 10 years, mimicking the trend in the US stock market. Apple and Microsoft have occupied the fund’s top two spots for much of that time, weighing 6% combined in 2015, growing to occupy 14% of the portfolio in March 2026.

The growth of these companies and other technology firms has given that sector a larger share of this portfolio than its average peer. But apart from that, sector allocations and style positioning appear nearly identical. This ensures that investors receive the mega-cap exposure the fund aims to provide.

Vanguard's equity index group earns an Above Average People Pillar rating for its well-supported and stable management team adept at leveraging Vanguard's comprehensive resources. Its portfolio managers benefit from the firm's global infrastructure and advanced portfolio management technology, which facilitates cost-efficient trading around the globe. The infrequent turnover of managers, coupled with Vanguard's practice of rotating them across various funds, enhances their expertise and understanding of different market segments.

The fund's managers directly handle trading, providing them with deeper insights into the portfolio's operations than a stand-alone trader might have. They are backed by a global team of dedicated personnel and employ sophisticated, scalable technology to minimize their workload and enhance tracking accuracy. Vanguard's independent risk management team plays a crucial role in ensuring its funds adhere to predetermined tracking tolerances. It collaborates closely with the managers to oversee trades and address potential issues proactively. Vanguard compensates managers based on tracking-error and excess-return metrics to foster a culture of accountability and ensure that the management team's interests are closely tied to investors'.

Vanguard maintains its High Parent Pillar rating as it continues to grow under new leadership.

CEO Salim Ramji has had a busy first year captaining Vanguard’s crew, and the ship remains pointed in the right direction. The firm made its largest round of fee cuts in early 2025, which came at an estimated cost of USD 350 million. It established a separate division dedicated to its advice and wealth management efforts, a sign that it wants to seriously compete within those lines of business. Asset growth has continued to be a huge success. Only BlackRock’s inflows rival the money Vanguard is taking in. Likewise, the number of clients it serves has more than doubled since 2015.

Despite that success, an ever-growing number of clients has presented a challenge: Vanguard can’t grow its services fast enough to keep up with demand. In some instances, it has had to curb certain services and capabilities or raise fees on others to cope, causing some loyal clients to criticize what they perceive as deteriorating services.

Vanguard has ambitions to bring its disruptive legacy to the bond market. It created roughly a dozen low-cost bond exchange-traded funds for US investors and several others abroad over the 12 months through June 2025. All have low fees in their respective categories, and the actively managed strategies align with Vanguard’s philosophy. They are relatively easy to understand and are conservatively managed.

Vanguard has another opportunity to prove that clients are still its priority. On the surface, its endeavor into the high-fee deal-making world of private assets alongside Wellington and Blackstone looks like a cultural mismatch. So far, the collaboration hasn’t produced anything that’s concerning.

The ETF share class outperformed its average large-blend peer by 2.68 percentage points over the 10 years through March 2026. It was more volatile than some peers but managed a superior risk-adjusted performance than the category average. Strong returns from top holdings Apple, Nvidia, and the rest of the technology sector powered the fund’s performance over the past five years.

The fund outperformed its average peer in every full calendar year from 2011 through 2025, except 2022. The fund’s overweight technology position pulled it further down than its peers that year as those stocks suffered more than most. It lost 20%, nearly 3-percentage-points worse than the large blend norm. However, the fund recovered the following year, gaining 30% in 2023. Its hefty technology allocation helped it bounce back, outperforming the norm by nearly 8 percentage points.

The strategy’s performance should generally resemble that of the US stock market, with a bit more emphasis on the largest stocks. Remaining fully invested has been a boon in a market that has performed well over the past decade. The lack of a cash position can lead to greater losses in market downturns, and the absence of mid- and small-cap stocks prevents the fund from reaping their rewards if they outperform. However, large-cap stocks have led markets higher for most of this fund’s life, so these potential disadvantages have not held the fund back so far.

Vanguard Mega Cap ETF's Prospectus Adjusted Expense Ratio is 0.05% per year. It places it in the cheapest quintile of the Morningstar US Fund Large Blend Category, where the median fee is 0.67% per year. This cost positioning translates into a Medalist Rating Price Score of 2.28, which reflects its relative price positioning within the category. The Price Score ranges from -2.50 (most expensive) to +2.50 (cheapest), with higher scores indicating better cost competitiveness.