2 Popular AI Stocks to Sell Before They Fall 46% and 73%, According to Wall Street Analysts

Despite strong operational performance, including Palantir's accelerating revenue growth driven by its AI platform and Arm's increasing data center market share, certain Wall Street analysts contend both stocks are wildly overvalued. Palantir (PLTR), trading at 126x sales and the most expensive S&P 500 stock, has an implied 73% downside to RBC Capital's $45 target, while Arm Holdings (ARM), the third-most expensive Nasdaq-100 stock at 94x adjusted earnings, faces a 46% implied downside to Morningstar's $80 target, prompting recommendations for caution or avoiding new positions.

Analysis

Palantir (PLTR) and Arm Holdings (ARM) exhibit a significant disconnect between strong operational momentum and extreme valuation levels, prompting cautious analyst sentiment. Palantir has demonstrated impressive execution, with its Artificial Intelligence Platform (AIP) driving eight consecutive quarters of accelerating revenue growth and securing a market-leading position in decision intelligence platforms according to IDC. However, its valuation at 126 times sales makes it the most expensive stock in the S&P 500, leading RBC Capital to issue a target implying 73% downside. Similarly, Arm Holdings is rapidly expanding its data center market share, having gained 10 percentage points over two years by leveraging its power-efficient architecture, which is being adopted by major technology firms including for Nvidia's Grace Blackwell Superchip. Despite this, the stock trades at 94 times adjusted earnings and a price/earnings-to-growth (PEG) ratio above 4, which is traditionally considered overvalued, particularly against a 23% forecasted annual earnings growth. This valuation places it as the third-most expensive stock in the Nasdaq-100 and supports Morningstar's price target suggesting a 46% potential decline.

Key Decisions for Investors

• Given the extreme valuation multiples for both Palantir (126x sales) and Arm (94x adjusted earnings), investors should acknowledge that current prices have priced in years of flawless execution, exposing portfolios to significant downside risk if growth momentum falters.
• For investors with concentrated positions in Palantir, it may be prudent to consider trimming exposure to manage risk, especially in light of analyst targets suggesting a potential 73% decline from its current trading levels.
• Prospective investors in Arm Holdings should exercise patience and await a substantial valuation pullback before initiating a position, as a PEG ratio above 4 indicates the stock is priced for a level of perfection that may be difficult to sustain.
• Closely monitor upcoming earnings reports for any deceleration in Palantir's revenue acceleration or Arm's data center market share gains, as any negative surprise could act as a catalyst for a sharp price correction from these elevated levels.