Core Viewpoint - Major banks including Morgan Stanley, Deutsche Bank, and Evercore have warned that the S&P 500 index may decline by 10% to 15% in the coming weeks to months due to high valuations and weakening economic indicators, despite a strong rebound over the past three months [1][5][6] Group 1: Market Performance and Predictions - The S&P 500 index has risen sharply since April, reaching historical highs, with a 1.47% increase on Monday, closing at 6329.94 points [2][6] - Analysts predict a potential adjustment of up to 10% this quarter, with Evercore forecasting a possible decline of 15% due to tariffs impacting consumer and corporate finances [5][6] - The S&P 500 index's 14-day Relative Strength Index (RSI) recently surpassed 76, indicating overbought conditions, which historically precedes market corrections [6] Group 2: Economic Indicators and Market Sentiment - Recent economic data shows a resurgence in inflation, alongside slowing job growth and consumer spending, raising concerns about the U.S. economic outlook [6] - Historically, the S&P 500 has performed poorly in August and September, averaging a decline of 0.7% during these months over the past 30 years [6] - Increased costs for hedging against market downturns are evident, with the implied volatility premium for put options on the SPDR S&P 500 ETF reaching its highest level since the regional banking crisis in 2023 [6] Group 3: Investment Strategy and Long-term Outlook - Despite short-term bearish sentiments, analysts maintain a bullish long-term outlook, suggesting investors should continue holding positions, particularly in companies benefiting from the AI trend [7] - Historical patterns indicate that the S&P 500 typically experiences minor corrections of about 3% every 1.5 to 2 months and larger corrections of over 5% every 3 to 4 months [7] - Market participants appear to be adopting a strategy of buying during corrections, as evidenced by the recent uptick in the S&P 500 and Nasdaq 100 indices [8]