VOO vs. QQQ: Broad Market Exposure or Concentrated Mega-Cap Growth?

The Vanguard S&P 500 ETF (VOO) and the Invesco QQQ Trust (QQQ) both provide exposure to large U.S. companies, but their portfolios differ in concentration and structure. This comparison examines how broad-market exposure contrasts with a more concentrated allocation to mega-cap growth stocks, and what that means for investors' portfolio risk and investment returns.