A surprise Fed rate pause boosted base metals as copper, aluminum, and zinc rallied, with a weaker dollar stoking demand for commodities.
Copper futures gained as the Fed's decision to pause rate hikes lowered the opportunity cost of holding non-yielding assets and improved the demand outlook for industrial inputs. The weaker dollar added to the tailwind.
The Federal Reserve's decision to keep rates unchanged eased concerns that higher borrowing costs would dampen industrial activity, boosting copper demand expectations. Additionally, a weaker dollar made the metal cheaper for international buyers.
Short-term, the rally may extend if economic data confirms a soft landing. However, weak manufacturing data from China or a hawkish pivot by the Fed could quickly reverse gains.
The dollar index declined as the Fed's rate pause reduced the currency's yield advantage, and markets priced in a less aggressive tightening path. Lower rates typically weigh on the dollar, benefiting commodities.
The pause removed a key source of dollar support—rising US interest rates. With the rate differential narrowing prospectively, the dollar became less attractive.
A weaker dollar makes commodities priced in greenbacks cheaper for holders of other currencies, typically boosting demand and lifting prices.
Copper surged 2.8% on Tuesday after the Federal Reserve kept interest rates unchanged, alleviating recession fears that had weighed on industrial metals. The decision weakened the dollar, making commodities cheaper for non-dollar buyers. Aluminum and zinc also posted gains, reflecting a broad rally across base metals.
The pause eased fears that rising borrowing costs would stifle manufacturing and construction, key consumers of base metals. It also pushed the dollar lower, making commodities priced in greenbacks more attractive globally.
Besides the Fed, demand from China—the world's largest consumer—and supply disruptions in mining regions are key drivers.