Lowering of LFTs with simvastatin?

Years ago a doctor suggested I might have fatty liver as a result of prolonged high LFTs, though no firm diagnosis was ever made. Recently I've been seen by an endocrinologist for metabolic syndrome. As a part of therapy, I was prescribed simvastatin. Because I have a history of elevated LFTs (and also presented with them), the doc has been checking them regularly. After several months on simvastatin, I now have normal LFTs. The doc was afraid they would increase. The reverse has proven true.

Can someone please explain how this is possible, and under what circumstances this might occur? I've been plagued with health problems over the years and find this one unusual. I was unable to find any information on the reduction of LFTs with simvastatin.