As of August 7, the S&P 500 has recorded 25 new all-time highs in 2026, achieving a total return of 13.7%, marking its seventh-best start to a year in 33 years. This rally has been primarily driven by a 29% year-over-year earnings growth in Q2, with Micron Technology's year-to-date return reaching 208%, contributing almost as much to the index as NVIDIA, despite its significantly lower index weight. Historical data shows that after the S&P 500 hits a new high, there is a 76% probability of positive returns in the subsequent six months, with a median gain of 8.25%, though the situation in 2007 indicates that this pattern is not an absolute guarantee.