New York's financial firms have quietly built a leading position in one of the fastest-growing corners of debt markets: green bonds, which fund clean-energy and climate projects. Underwriting volumes handled by the city's banks have reached record levels.

The fictional advisory firm Verdant Capital now runs a dedicated desk structuring bonds for wind, solar, and grid projects. Its bankers say demand from pension funds and insurers seeking climate-aligned assets has turned a niche into a mainstream business.

Skeptics warn of "greenwashing," where labels outpace real environmental benefit, and standards are still evolving. But as capital flows toward the energy transition, New York is positioning itself as the place where those deals get done.