Wall Street put up a mixed performance last week, with a slump around the middle but a strong finish. The slump was driven by fears of an AI bubble and doubts over the substitutability of AI investments, while gains on Friday came on the heels of Federal Reserve Chair Jerome Powell’s hint at a September rate cut possibility.In fact, Wall Street rallied sharply on Aug. 22, 2025, as Jerome Powell suggested that interest rates could be lowered as soon as September in his Jackson Hole address.  In his remarks, ...