@tonyf That cant be right. IB will do calculations in your base currency but if the margin is posted in KRW or whatever it will charge you interest on the amount. I was recently hit with unexpected and high interest charges on CNH-denominated margin just by having a position in RMB (CNH) currency futures on USD.CNH
You are perfectly right, any broker charges margin on local currency, and - except for day trading - if you are short the local currency you have to pay the daily interest (as the rollover in FX trading) on local currency.
But, still, this doesn't help, still problems remain on idle cash you have in your account, just because you don't trade in 100% margin, do you?
Incidentally, for people having multimillion dollar account, the question is not restricted to the Euro.
For example, 3 months Tbill yield about 1.5%, many brokers pays nothing on USD liquidity, while IB pays 1.06% (above 10k). For little accounts (or even for median ones), 0.5%, or even 1.5% means a little cash amount, so there's no reason to worry about.
Burt for very large accounts, 1.5%/y can be a very substantial amount, so I guess the original question should be rephrased as this: "does anyone know any brokers, who has
- the standing of IB (well, sort of...), as global coverage, security of funds, fees, API.... etc
- is accessible to retail,
- accept short term treasury (both in EUR or USD) as collateral?
If yes, please let me know.
It doesn't matter the currency, if one has a very large account and is not allowed to use ST bond as margin (with the proper haircut, of course), this one is leaving a lot of money on the table.