Bank of America strategists, led by Michael Hartnett, have reiterated concerns about rising bubble risks in the US stock market amid loosening monetary policy and easing financial regulation. Hartnett specifically warned that the rally in major US technology stocks appears stretched. Meanwhile, Goldman Sachs credit strategists have advised clients to hedge risks as global corporate credit spreads tightened to their lowest levels since 2007, signaling elevated credit market risk. Despite the S&P 500 hovering near all-time highs, market breadth is narrowing, with fewer stocks participating in the rally, a classic indicator of weakening market participation. These developments have prompted comparisons to the Dot-Com Bubble era, raising caution among Wall Street analysts about high valuations and potential market vulnerabilities.