Key Points The Defiance Quantum ETF gives investors exposure to nearly 80 quantum computing stocks. It has a 0.40% expense ratio, low for a specialized ETF like this. Investors should expect volatility as quantum computing continues to rapidly evolve. 10 stocks we like better than ETF Series Solutions - Defiance Quantum ETF › I won't get too technical, but here's the main idea behind quantum computing: Traditional computers, like the one I'm using to write this article, depend on binary "bits" of ...