VOOG vs. MGK: Tech Exposure is Key

Vanguard’s Mega Cap Growth ETF (MGK) and S&P 500 Growth ETF (VOOG) share the same low 0.07% expense ratio but differ materially in breadth and sector concentration: VOOG holds 217 stocks (AUM $21.7bn) with roughly 44% in technology, communication services at 15% and consumer cyclical at 12%, while MGK is far more concentrated with 66 holdings (AUM $33.0bn) and ~69% in tech; both have NVIDIA as the top holding (~15%), but Microsoft and Apple comprise a larger share of MGK (top three >38% of assets). Performance and risk metrics are comparable — 1‑yr returns as of Dec. 12, 2025 were 17.5% for VOOG and 15.7% for MGK, five‑year max drawdowns were ~33.1% and ~36.4% respectively, and VOOG yields 0.5% vs MGK’s 0.4% — so the practical decision for investors is focus versus breadth: pick MGK for concentrated, higher beta exposure to mega‑cap tech; pick VOOG for broader S&P 500 growth exposure and modestly lower single‑stock and sector concentration risk.

Analysis

Both Vanguard ETFs charge the same low expense ratio of 0.07% and target large-cap U.S. growth exposure, but they differ materially in breadth, concentration and short‑term performance. As of Dec. 12, 2025 VOOG held 217 stocks with $21.7bn AUM, a 0.5% dividend yield and a 1‑year total return of 17.5%, while MGK held 66 stocks with $33.0bn AUM, a 0.4% yield and a 1‑year return of 15.7%. Both funds list NVIDIA as the top holding (~15%) but MGK’s top three (NVIDIA, Apple, Microsoft) represent over 38% of assets versus VOOG’s more dispersed weights (NVDA 15.3%, MSFT 6.2%, AAPL 5.7%).

Sector and risk profiles diverge: MGK is roughly 69% technology, producing higher concentration and potential idiosyncratic risk, whereas VOOG is ~44% tech with material allocations to communication services (15%) and consumer cyclical (12%), lowering single‑stock and sector concentration. Five‑year metrics show MGK had a larger max drawdown (36.4% vs VOOG 33.1%) but slightly higher 5‑year growth of $1,000 ($2,083 for MGK vs $1,978 for VOOG), indicating higher return potential alongside greater volatility.

For investors the practical distinction is focus versus breadth. With identical fees and no leverage, choice should be driven by desired exposure to mega‑cap tech and tolerance for concentrated drawdowns versus preference for broader S&P 500 growth diversification and a marginally higher dividend.

Key Decisions for Investors

• Investors seeking concentrated, higher‑beta exposure to mega‑cap technology should consider MGK but size positions smaller or use hedges given its ~69% tech weight and larger historical max drawdown
• Investors preferring broader S&P 500 growth exposure, modestly higher yield (0.5% vs 0.4%) and lower single‑stock concentration should favor VOOG as a core growth holding
• Because both funds charge 0.07% and avoid leverage, make the selection based on risk tolerance and monitor the top three holdings (NVDA, MSFT, AAPL) and drawdown behavior to reassess allocations