买的时候和买个股一样设置了limit order,结果提示如下:
Invalid expiration date-GTC orders must be entered
with an expiration date of 2 business days from today.
Otherwise, you should enter a TIF day
GTC order是指的啥? TIF一栏已经默认选的 “day”,为何还提示要“enter a TIF
day”
买spy这种ETF和买个股的操作难道有不一样的地方么?