A 30/70 portfolio (such as Larry Portfolio) performs OK.
A third in 3x leveraged stock, two thirds in bonds tracks 100% in the 1x relatively closely provided you periodically rebalance (every 6 to 12 months or so).
10% 3x, 90% bonds = Nassim Taleb/Zvi Bodie style, which might reasonably be expected to provide 30/70 type risk/reward.
XIV has had a really good run since 2010. Something to be conscious of i.e. historic actual performance shouldn't be considered a as guide to forward direction performance.
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