What is the single biggest ETF risk?
Could you please elaborate on the primary and most significant risk associated with investing in Exchange Traded Funds (ETFs)? Could you also provide insights into how investors might mitigate this risk and ensure their portfolios are protected from potential losses? I'm particularly interested in understanding the factors that contribute to this major risk and the strategies investors can adopt to safeguard their investments. Would you be able to offer some practical advice on how to identify and manage this ETF risk effectively?