Top executives from some of Wall Street’s most powerful institutions are cautioning that U.S. equity markets could soon face a major pullback, as valuations reach historically elevated levels and investor optimism continues to fuel record-breaking rallies.Speaking at the Global Financial Leaders’ Investment Summit in Hong Kong, Goldman Sachs CEO David Solomon said equity markets may experience a 10% to 20% correction within the next 12 to 24 months. While he described the current environment as broadly posi ...