At a G20 summit, BlackRock CEO Larry Fink called for governments to develop a stronger long-term climate finance plan to fund the transition to a low-carbon economy. Fink also called for reform of the IMF and the World Bank to make them more suited to tackle the challenge of climate change. Guarantees by the institutions could lead to huge additional investments in green technologies in emerging markets. For example, the U.S. government guarantee of mortgage insurers led to a $11 trillion market for home loans.