The S&P 500 is hitting record highs, but experts warn of dangerous market euphoria, reminiscent of 2021. Meme stocks like Opendoor are surging with massive options flow, raising concerns about irrational exuberance. Margin debt is spiking, retail speculation is high, and key indicators signal euphoria. History shows extreme investor sentiment often precedes market corrections.

As indicators of market frothiness pile up, traders are advised to reassess risk. August and September historically bring S&P underperformance. Barchart tools like Options Flow Screener and stock monitoring can help investors stay ahead and track key indicators. Be cautious in the current market environment.

Read more at Yahoo Finance: Meme Stocks and Market Euphoria