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That matters because climate tech requires experimentation, and VC firms that provide money to nascent businesses are playing an essential role by giving climate tech startups risk capital, said Adesina.

"It's hugely disappointing," Dimon said of the capital requirements, adding the "operational risk capital is based on a model that makes no sense."

“These changes would raise market risk capital requirements by correcting for gaps in the current rules,” Mr. Barr said.

The index grades states on research and development, risk capital and entrepreneurial infrastructure, investment in human capital, tech employment and tech concentration, and dynamism.

A widening yield gap could accelerate yuan depreciation and risk capital outflows.