Has the rapid rise of the S&P 500 index come to an end? Analysts warn that it may slowly climb or even consolidate in the coming months.

Although the S&P 500 index has returned to historical highs, the rapid increase seen in US stocks over the past two months has clearly slowed down, there is no doubt about that. Since the low point in March, the benchmark index has surged more than 19% in just 41 trading days. Analysts at DataTrek Research pointed out that this increase is approaching the level of 'two standard deviations', which statistically is extremely rare and typically only happens once or twice every 100 trading days. This may mean that the easiest phase for making money in the short term is over, and investors should prepare for a slower climb or sideways consolidation during the summer in the US. Jessica Rabe from DataTrek wrote in a report to clients on Wednesday: "Historical experience suggests that the S&P 500 index may consolidate at this level, and the pace of ascent is likely to significantly slow down." This slowdown may already be underway. Although the S&P 500 index hit a new closing high on Thursday, it was only 0.8% higher than the closing price on May 14th. The index has seen daily fluctuations of less than 0.7% for five consecutive trading days, making it the calmest period since February. The spread between the highs and lows on Wednesday was the smallest this year, although the sharp drop in oil prices provided a macroeconomic boon to the stock market. Even the catalyst that drove the market higher on Thursday may lead to a range-bound summer market, as the US and Iran have reached a 60-day temporary agreement, extending the ceasefire and initiating further negotiations on Iran's nuclear program. This agreement may result in the conflict remaining unresolved rather than reaching a definitive conclusion. The current situation is that the market may be facing a lack of catalysts for both upward and downward movements. Mark Hackett, Chief Market Strategist at Nationwide, said: "The market is in a rare position where technical factors provide mild support, positions and sentiment are optimistic but not overly complacent, and fundamentals are at their strongest level in five years without showing signs of overheating. This intersection makes shorts hesitant and limits the magnitude and duration of any pullback. It is difficult to see any factors in the short term that could break this pattern." The lackluster market performance can be attributed to several factors. Danny Kirsch, Options Head at Piper Sandler, pointed out that the open interest contracts for bullish options on the S&P 500 index are highly concentrated at the 7600 level, less than 0.5% from the current trading price. In addition, there is a "significant" divergence in individual stock performance. Tech stocks have been outperforming other sectors in the market. Kirsch said: "Tech stocks have been strong regardless of changes in oil prices, and this wave of AI trading seems to continue to rise. The current situation is that tech stocks continue to rise, while all other sectors seem to have been thrown into a blender." Rabe noted that the S&P 500 index's year-to-date increase is only slightly higher than the upward revision of earnings expectations, meaning that forward price-to-earnings ratios are still limited to around 21 to 22 times in the context of high bond yields and stubborn inflation. She wrote: "This lack of revaluation, that is, even though earnings exceed expectations, the valuation multiple of the S&P 500 remains stagnant, is a key issue in determining whether US stocks can experience another significant rise." She added that a swift resolution to the Iran war may be needed to further expand price-earnings ratios. Of course, the opposite scenario of downside risks still exists. Sameer Samana, strategist at the Wells Fargo Investment Institute, believes that any significant escalation in the Middle East situation, as the market has already partially priced in expectations of peace agreements, could have a negative impact. Additionally, the uncertainty brought by midterm elections has always been a short-term headwind, and rising rate expectations may also suppress the stock market. However, Samana emphasized that the fundamental forces driving this year's rise are more important. He said: "The bullish camp has perhaps the most important factors: a robust economy, continued consumer resilience, and ongoing development of AI infrastructure. If these factors continue, the S&P 500 index is likely to climb slowly unless there is a clear downward catalyst."