Quote from Rearden Metal:
Meanwhile, GLD is $61.68 x 61.69.
Unfortunately, it's not a leveraged instrument.
EDIT: "pays/receives carry on shorts/longs."
Say for example I'm long gold (at Oanda), leveraged 10-1.
How much am I paying to carry this position? Like 7% APR?
RM, it's much more than 7%. Right now, it would cost you 5.875% x 10 = 58.75% APR.
Here 5.375% - (-0.5%) = 5.875% is the net debit of an XAU/USD long, per each 1:1 unit of leverage. If you were short instead, you'd receive credit of 4.825% - 0.5% = 4.325% per each unit of leverage. Whether debit or credit, it's computed continuously and posted to your account daily at 4 pm ET or whenener there's a change in position size.
For example, using your specified leverage: $100,000 account balance, long $1M worth of gold, i.e., about 1,609 oz. It would cost you $161 daily (0.16% of your account balance), or ~$58,750 annually (58.75%) to keep that position, assuming no change in those lend and borrow rates.
http://www.oanda.com/products/fxmath/interest.shtml
In terms of the b/a spreads, they come down as low as $0.50 and $0.05 for gold and silver, respectively, for several hours daily, but widen to 3-4 times that during the least liquid times. As riskarb mentioned, the commission is built in.
Personally, I find Oanda's platform particularly well suited for short-term (intraday to a few days) trading of gold, compared to futures. Not silver, though, due to its disproportionately wide spreads, as a % of either ATR or price itself.