IB margin rates are currently 3.92%, for example:
https://www.interactivebrokers.com/en/index.php?f=1595
Though maybe LEAPS (and for indexes, futures) are a still cheaper way to get leverage.
Edit: goodness, the rates on some of those currencies is less than the dividend yield of those countries' indexes... If I don't expect New Zealand to sink into the sea, is it stupid not to borrow NZD and invest in the NZ top 50?
IIRC, last time I looked at margin out of curiosity with my brokerage firm (schwabs/2014), I also remember to be around 10%.
I can’t help but think we are living in a unattainable economic environment...