S&P 500 All-Time Highs Have Historically Been Followed by Positive Long-Term Returns

Since 1950, S&P 500 all-time highs have historically been followed by average gains of 9.5% over the following year.
Average forward returns rise to 30.2% after three years and 55.8% after five years.
The historical data shows that reaching a record high has not, by itself, typically marked the end of a longer-term market advance, although past performance does not guarantee future returns.