Quote from gkishot:
Actually I have to take it back. Interest charged in forex and interest on futures are about the same. Around 5% a year of your position. So don't overleverage usd/jpy if you are planning to hold it for a long time. I still believe that nikkei index is a better option in a long run.
No, interest charged on cash forex and currency futures is most definitely NOT the same in the real world, as I've explicitly stated above. Refer to the same
IB link I gave above for details.
At IB, it costs you 1.5% extra per year for every 1:1 unit of leverage, if any, to maintain a reverse carry trade, long USD/JPY, in cash vs. futures. Why is that? Note the last line of the table called "Interest Expense Rates", showing what the interest debit will be for a short position of up to USD 100,000:
USD ..... 100,000 ..... BM + 1.5% .....
Essentially, that's why. Specifically:
For cash forex, USD/JPY:
1) you pay USD 50,000 x 6.298% / 365 = $8.63 debit daily
2) you receive JPY 0 credit daily.
If the benchmark rates were to stay the same, it would cost you $3,149 annually to maintain this position. After 5 years, you will have paid $15,745 in interest debits.
For currency futures, 6J:
Unlike cash forex,
the implied interest rate differential (IRD) of currency futures has no built-in broker spreads. Whether you are a 1-lot player or get your currency tips at your weekly golf game with Warren Buffett, you still get the same, unadjusted, fair IRD. As each futures contract price converges to the inverse of the spot price at expiration, your effective net interest cost is going to be no more and no less than the futures implied IRD, currently, 4.8% or so. As opposed to 6.3% -- there's your difference, 1.5%.
Annual implied futures interest cost: $2,399 for every USD 50,000 worth of the futures. Est. annual savings of futures over cash: $750. Est. savings after 5 years: $3,750.
So, what's the big deal, you might ask? After all, that's just 7.5% of your beginning account balance of $50,000. Well, that's because we assumed an extremely conservative 1:1, no leverage. If your beginning account balance were $10,000, at 5:1 leverage, your savings would be 37.5% of that balance, hardly insignificant.