@seraphim502, this is a fantastic analysis of the US stock market! I'm particularly impressed by your deep dive into the mean-reversion theory and how it applies (or doesn't!) to the current market conditions.

The way you've presented the data, highlighting the strength of momentum investing in the US, is incredibly insightful. Those charts illustrating the earnings momentum and sector leadership are worth a thousand words.

Your conclusion – that sticking with leading stocks is more prudent right now – is a bold call. What are your thoughts on how long this period of "riding the wave" might last, and what indicators would signal a shift back towards mean reversion? I'd love to hear other's thoughts! Thanks for sharing your expertise!