The S&P 500 index is showing signs of maturation, indicated by a weekly exhaustion signal that suggests the current rally may be nearing its peak. Analysts warn that the potential for a 'sell the news' reaction could arise from a forthcoming US-Iran peace deal, which may dampen market enthusiasm. Coupled with signs of buyer exhaustion, the index's upside appears limited. Furthermore, June is historically a weak month for the S&P 500, especially during mid-term election years, raising concerns that the index could close flat or lower after initial rally attempts. While analysts do not predict an immediate market top, they caution that the S&P 500 is at risk of rolling over, which could lead to declines in the near future. The article emphasizes that past performance is not indicative of future results, and it expresses the author's personal investment views, including a beneficial long position in the Vanguard S&P 500 ETF (VOO).