Why Nvidia, Broadcom and other highflying stocks are especially risky now

While debunking the myth of October being uniquely prone to broad market crashes, the article highlights significant crash risks for specific high-momentum sectors over the next two years. Academic research indicates industries outperforming the S&P 500 by 100-150 percentage points over two years face 53-80% probabilities of a 40% decline. Notably, "independent power producers & energy & traders" (outperforming by >200pp) and "semiconductors & semiconductor equipment" (128pp, including Nvidia and Broadcom) are identified as highly vulnerable.

Analysis

While academic analysis suggests the probability of a broad, market-wide crash in October is a minimal 0.06% on any given day, consistent with other months, significant risk is currently concentrated in specific high-momentum sectors. Research cited from Harvard University indicates that industries outperforming the S&P 500 by 125 to 150 percentage points over a two-year period face a 76% to 80% probability of a subsequent crash, defined as a 40% decline within the next two years. This model flags the 'semiconductors & semiconductor equipment' industry, which has outperformed by 128 percentage points and includes major stocks like Nvidia (NVDA) and Broadcom (AVGO), as highly vulnerable. The risk appears even more acute for the 'independent power producers & energy & traders' industry, which has beaten the S&P 500 by over 200 percentage points and includes names like AES Corp. (AES) and Vistra Corp. (VST). It is critical to note this is a probabilistic risk over a two-year horizon, not a guaranteed event, as a prior warning on semiconductors led to a 21% correction rather than a full 40% crash.

Key Decisions for Investors

• Investors with concentrated, long-term positions in the high-flying semiconductor and independent power producer sectors, particularly in names like NVDA, AVGO, AES, and VST, should urgently review their exposure in light of the historically high statistical probability of a major drawdown.
• Given the 76-80% probability of a 40% decline over a two-year horizon for these identified sectors, implementing protective strategies, such as trimming positions or purchasing put options, may be prudent to mitigate downside risk.
• Avoid broad market de-risking based on seasonal myths, as the analysis clearly distinguishes the low probability of a general market crash from the acute, data-driven risks present in these specific over-performing industries.