其實呢到係咪冇人知隻etf做緊乜


佢用box spread去做risk free trading,用European style option就冇左early exercise既風險。但risk free就係risk free,return就點都同risk free return即係interest rate掛鉤。所以理論上點解要買BOXX呢,係因為外國係會有capital gain tax同interest income tax,一般t-bill係interest income= 100% taxable,而BOXX唔派息,收益實際係capital gain tax=50-65% taxable
所以呢隻野係俾d鬼佬買黎做tax efficient既money market fund,唔係俾香港呢d免稅既地方考慮