QUOTE(Yggdrasil @ Sep 10 2020, 04:40 PM)
You should evaluate based on marginal benefit basis.
E.g. TSG charges 2.5% additional interest on IBKR's rate for margin.
If you borrow >$4800 per annum (don't plan to close the margin), it's better to use IBKR instead.
Reason is because you are charged additional $120 per year for borrowing $4800 using TSG than IBKR.
This means if you have no transactions during the year and borrowed $4800 on margin, and margin rates are:
Your monthly statement will look somewhat like:
So, you technically break even if you borrow exactly $4800 for the whole year.
This is one method of evaluating which is better for you.
suddenly so complicated... E.g. TSG charges 2.5% additional interest on IBKR's rate for margin.
If you borrow >$4800 per annum (don't plan to close the margin), it's better to use IBKR instead.
Reason is because you are charged additional $120 per year for borrowing $4800 using TSG than IBKR.
This means if you have no transactions during the year and borrowed $4800 on margin, and margin rates are:
| IBKR | 0% |
| TSG | 0%+2.5%=2.5% |
Your monthly statement will look somewhat like:
| Detail | IBKR | TSG |
| Minimum commission | $10 | $0 |
| Additional finance cost | $0 | $(4800 x 2.5% / 12)=$10 |
So, you technically break even if you borrow exactly $4800 for the whole year.
This is one method of evaluating which is better for you.
Sep 10 2020, 06:28 PM

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