While market attention remains fixed on volatility in the AI sector and dramatic swings in the momentum factor, a quiet migration of capital is unfolding within the cybersecurity software space.

Over the past three months, several leading US security software stocks have posted gains exceeding 100%, with a concurrent recovery in cloud computing demand, together painting a picture of structural rotation within the broader technology sector.

US cybersecurity giants Palo Alto Networks and Rapid7 have led the charge, both surging over 100% in three months.

They are followed by CrowdStrike, Qualys, Fortinet, Okta, and Tenable, with gains clustered between 85% and 95% over the same period.

Simultaneously, the business growth rates of major cloud service providers are re-accelerating, driven by AI demand.

This rally is set against a backdrop of extreme turbulence in the momentum factor, which rebounded over 9% in a single day after a 33% drawdown, marking its largest one-day gain in nearly five years.

Data from Goldman Sachs indicates the 30-day volatility of the momentum factor is at an extremely high level relative to the broader market index, suggesting that extreme single-day market moves may persist.

The Underappreciated Rotation Theme

As attention was captured by adjustments in AI concept stocks and the wild swings of the momentum factor, capital has already completed a significant accumulation within the security software track.

Market data shows that Palo Alto Networks and Rapid7 have both seen their share prices more than double over the past three months.

Gains for CrowdStrike, Qualys, Fortinet, Okta, and Tenable have been concentrated in the 85% to 95% range.

From a valuation perspective, the forward EV/Sales multiples for Palo Alto Networks and CrowdStrike have risen significantly alongside their share prices, yet investors continue to buy.

This suggests the market is assigning a high premium to the long-term growth logic of cybersecurity demand, rather than engaging in purely short-term speculation.

Cloud Computing Demand Reaccelerates

Data from Coatue indicates that the business growth rates of major cloud service providers are picking up speed again, aligned with increasing AI adoption.

This provides fundamental support for the overall valuation of the technology sector and serves as a crucial backdrop for the continued expansion of security software demand.

The deepening migration of enterprises to the cloud directly drives procurement demand for identity verification, endpoint protection, and cloud security products.

Momentum is AI: The Structural Nature of Factor Trading

Data from Goldman Sachs' Marquee platform shows the correlation between the momentum factor and AI-related assets has climbed to an extreme level above 95%, meaning momentum trading is, in essence, AI trading.

This structural characteristic explains why every fluctuation in the AI sector creates a magnified effect at the momentum factor level and ripples out to affect broader technology holdings.

For ordinary investors not directly involved in factor trading, this means their actual risk exposure within technology holdings remains highly tied to the AI theme.

Bull-Bear Divide: The Bubble Debate Intensifies

There is a clear divergence in the market's judgment on current technology valuations.

On the bullish side, Fidelity's Timmer argues that while the S&P 500's price trajectory closely mirrors that of 1999, the fundamental backdrop is "far healthier than 26 years ago," suggesting excessive concern over bubble risk is unwarranted.

Research firm Numera notes that tech stock returns typically move in sync with changes in demand for IT hardware, software, and semiconductors, but this year's tech gains still lag the actual explosion in demand, hinting that upside potential remains underappreciated.

On the bearish side, the semiconductor sector's market capitalization now represents 14% of the total S&P 500, nearly double its peak during the dot-com bubble.

Market strategist Andy Constan states plainly, "We are in a bubble. I don't know if the top is in, but if the bubble bursts here, the path will look very similar to the dot-com bubble—starting with several months of choppy consolidation."

The valuation of Apple provides another reference point: the company's price-to-sales ratio is nearing 11x, its highest historical level, a figure that, according to Bilello data, surpasses any point in the company's history.