Cathie Wood Advocates Tracking AI Spending for Investment Insights

Cathie Wood, CEO of ARK Invest, has proposed a new strategy for investors looking to navigate the evolving AI market: focus on the financial activities of autonomous AI agents instead of their conversational capabilities. Wood emphasized that understanding where these agents allocate funds could provide valuable insights into market trends.

According to reports from ARK, the duration of tasks managed by AI agents has significantly increased, evolving from approximately 12 minutes in early 2025 to over 180 minutes by early 2026. This shift is attributed to advancements from companies like Anthropic, enabling agents to handle more complex and lengthy tasks independently.

ARK's projections for AI-driven software spending are substantial, estimating a range between $3 trillion and $7 trillion, which reflects a potential growth rate of 19% to 56%. This growth is expected to be fueled by both enterprise and consumer adoption of persistent agent technology.

Wood also highlighted a potential transformation in AI monetization models, moving away from traditional subscriptions towards a pay-for-work-completed approach. This shift could be influenced by OpenAI's development of headless agents-as-a-service, which aims to increase per-user inference costs.

During the week of September 21, 2026, ARK made a significant investment of approximately $24.7 million in CoreWeave shares, showcasing its commitment to disruptive technology. While ARK maintains investments in digital assets like Bitcoin, its current focus is on traditional tech and infrastructure markets.

The implications of these trends suggest that companies capturing value in the AI sector may shift as agents transition from short tasks to longer, more complex projects. Infrastructure providers like CoreWeave may benefit from increased demand for computational power, while traditional software vendors could face challenges as the dynamics of subscription models evolve.