We have reached a disturbing moment in financial markets, where the noise to signal ratio across all asset classes is probably at an all time high, the August effect notwithstanding. Never has it been more important to adopt a strategic mindset to investing, rather than stampeding after the latest momentum trade without a shred of conviction. I've been a skeptic on economic decoupling, and had bet the right way on the dramatic reversal in the dollar (where I strongly suspect we saw discreet US intervention last week, possibly as a quid pro quo to the Gulf States/Saudi for maintaining their dollar pegs after recent visits by Hank Paulson). I'd advised a short on oil and other commodities, where the deteriorating outlook triggered a sudden slump, but I fear that equity markets are still dangerously complacent as to the risk of the brakes slamming on global growth. We will probably ...