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en. Margin as collateral 不用付利息。相反，可能券商要给卖put的cash付利息？
snailittle00
2026-05-03 18:19:22
( reads)
跟帖(1)
三心三意
2026-05-03 18:22:00
Either broker, or US government if you buy T-bill
三心三意
2026-05-03 18:22:00Either broker, or US government if you buy T-bill