Apple unveiled its first foldable smartphone, the $1,999 iPhone Duo, adding a major product launch to a market update spanning bonds, energy and presidential finances. The U.S. Treasury increased its latest long-dated bond buyback (repurchase of outstanding debt) to as much as $6 billion, triple the normal amount. Brent crude settled above $100 a barrel, while West Texas Intermediate reached $96.05. President Donald Trump’s energy portfolio increased in value by an estimated $1.5 million to $4.4 million between Feb. 27 and Aug. 31, according to a CNBC analysis. The article identifies Apple with the ticker AAPL.