$XL2CSOPHYNIX(07709.HK) The underlying logic of the 07709 Samsung 2x Long Hynix leveraged ETF: It only tracks twice the daily gain/loss of Hynix, not a fixed long-term 2x return. You're buying ETF shares, which don't carry shareholder rights of the underlying stock, making it unsuitable for long-term holding. The fund manager primarily uses swap contracts, combined with call options to borrow twice the exposure from banks. The banks earn fees and also hedge their risk. When the fund size gets too large, swap quotas are insufficient, and the option proportion is increased to 49%, leading to higher tracking error and costs (up to 40% annualized). The exposure must be reset daily at market close, increasing positions when the price rises and decreasing when it falls. Losses mainly occur due to NAV erosion during volatile periods, buying at high cross-market premiums, and amplified losses during downturns. Reminder: One-sided trends can amplify gains, but volatile gaps double the risk. Check the premium before buying. Leverage risk is high; ordinary investors should be cautious.

Summary: Chasing rallies and selling dips loses money in volatile markets.