I use LETF's in a less aggressive manner, interesting to see such remarkable results from AIM however. Thanks for sharing.
Hopefully self explanatory
i.e attempt to emulate a stock index characteristic of a left tail of losers, right tail of winners, central section that collectively is more cash like. Rebalance once/year. Sometimes the LETF will be the right (good case) tail, in other years the left tail, where there's a degree of inverse correlation between stocks and gold (so if LETF are the left tail hopefully gold will be the right tail).