Gold moves inversely with real US interest rates. Those are rising because markets think the Fed's reaction function is shifting in a hawkish direction under Warsh. That - plus the huge drop in oil prices - is driving up real rates as inflation tumbles...
Welcome to the "Deflation Trade." Markets are trading two shocks: (i) the rapid fall in oil prices, a deflationary impulse; and (ii) a hawkish shift in the Fed's reaction function, which is also deflationary. Real rates are up, which sends gold tumbling...