short 10 and 30 year t-bond futures for a couple of months maybe...

short 10 and 30 year t-bond futures for a couple of months maybe ? Australian treasury future margins are very reasonable except it is hard to find the sort of liquidity you require.
With $720k i'll leverage it out and buy bullion on comex 1 contract gives you 100oz of gold at a margin rate at approx au$4k per contract. gold coins are selling like hot cakes $55 per 10 grams of 99.9% gold + GST, so says an admin dude at Australian Post.