AI capital props up growth as banks write voluntary rules for agents that spend
The OECD's outlook and a new banking-industry paper show AI entering the economy through two control points: investment and authorization. The OECD projects global growth of 2.9 percent in 2026 and 3.0 percent in 2027, with the United States at 2.2 and 2.1 percent, the euro area at 1.0 percent in both years, and China at 4.5 then 4.2 percent. It says AI investment has supported trade and activity, while warning that spending increasingly relies on external financing. If expected returns do not materialize, a correction could be amplified through lenders and markets. At the transaction layer, six banks have published principles for agentic commerce: transparency, safety, privacy and data, customer choice, and interoperability. They identify identity, authorization, fraud prevention, liability, and customer protection as necessary foundations when AI agents begin choosing and paying for goods. The principles are directional, not an implementation standard. A later paper will develop the blueprint. AI is already supporting macroeconomic demand while the rules for letting agents transact are still being written. A purchasing agent can create disputes about who authorized a payment, who bears fraud, and whether it optimized for the customer's interest. The next phase of AI risk may arrive not as a model failure in a lab, but as ordinary credit, payment, and liability exposure distributed through the financial system.