The current bull market reached its fourth anniversary on Monday, with the S&P 500 having risen approximately 120% since its closing low on October 12, 2022. The sustained rally has been predominantly fueled by investor enthusiasm surrounding artificial intelligence and related technologies, particularly following the late 2022 release of ChatGPT.
Companies positioned as beneficiaries of the AI build-out have experienced dramatic gains. Nvidia, which transformed its profile from a graphics card manufacturer to a central player in the technology sector, reached a market capitalization of roughly $5.5 trillion, having first surpassed the $1 trillion mark in 2023. Micron Technology similarly crossed the $1 trillion threshold earlier this May. Technology stocks now comprise approximately 40% of the broader S&P 500 index, contributing significantly to recent market strength. The index topped 7,800 for the first time in the previous week and remains near record levels.
Despite the impressive run, market participants express uncertainty about the rally’s sustainability. Oppenheimer analyst Ari Wald noted that the current bull market ranks as the sixth longest among 24 cycles dating back to 1932. Based on historical analysis, the median time remaining before a cycle reaches its peak stands at 13 months, suggesting 2027 could mark the final phase. However, Wald also observed that the median fifth-year return historically amounts to 21%, indicating potential for additional gains before any peak occurs.
Concerns about market breadth and valuation pressures have emerged as headwinds. In September, 75% of S&P 500 stocks closed in negative territory as rising interest rate concerns drove investors toward a concentrated group of mega-capitalization companies. Small-cap stocks have particularly struggled, with analysts monitoring the Russell 2000’s performance relative to its 200-day moving average. Additionally, some strategists worry that third-quarter earnings may disappoint relative to elevated expectations, with Deutsche Bank strategist Parag Thatte suggesting that the rotation into technology stocks has become overdone.
Despite these cautions, multiple market participants maintained optimistic outlooks. Trivariate Research founder Adam Parker emphasized that the U.S. stock market should perform well, contingent on investors identifying and holding companies capable of delivering strong growth without disappointing results. The resilience of markets over the preceding four years reflected solid fundamental earnings amid the AI infrastructure expansion, though identifying winning securities may present increasing challenges.
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