Gold retreats for the third consecutive day on Friday, eroding gains seen in the first half of the week and approaching the key $4,100 mark per troy ounce. Indeed, the precious metal continues to face headwinds from the Fed's hawkish stance and renewed uncertainty surrounding the next round of US-Iran negotiations.

The rate did not move. That was the least interesting thing about Kevin Warsh's first meeting in charge of the Fed. The FOMC held its benchmark at 3.50%-3.75% for the fourth straight meeting, exactly as priced, and then the new chair used his first press conference to dismantle the machinery the market has leaned on for a decade.