[Citigroup Warning: Global Stock Markets at Most Severe Bubble Levels Since the 2008 Financial Crisis] BlockBeats News, June 5, Citigroup has warned that global stock markets are at their most severe bubble levels since the 2008 financial crisis, with its bear market checklist meeting 10 out of 18 risk signals globally. Rising valuations, bullish sentiment, AI-driven spending, and increased IPO activity are raising concerns. While Citigroup remains optimistic about the stock market before the end of the year, it cautions that if risk signals continue to rise, the strategy of buying the dip may become increasingly risky.