$Alphabet(GOOGL.US) has pulled back 20% from the high of 350, and the entire pullback process has seen little resistance or rebound, falling very smoothly. I still remember the overwhelmingly bullish sentiment across the internet in January. Looking back, when consensus becomes too strong, that's often the moment of reversal. Going from a 20% profit back to the breakeven point, my mindset shifted from holding confidently to regretting not selling earlier. It was a valuable psychological experience, turning theory into practice—when consensus is high, it's time to sell. The long-term trend for U.S. stocks remains positive, but taking profits at certain stages is also crucial.