May 25 (Reuters) - Finnfund has invested $15 million in a nature bond issued by African bank Ecobank Transnational Incorporated ETI.LG, the Finnish investment company said on Monday.

• The bond from Ecobank is aimed at mobilising up to $450 million to finance sustainable agriculture, biodiversity and water infrastructure across sub-Saharan Africa.

• These debt-for-nature swaps aim to reduce interest payments so governments can spend more on conservation, but the market has faced a relative drought since U.S. President Donald Trump's return to power, with U.S. government support for them drying up.

• In February, British fund management and insurance company Legal & General LGEN.L said it was committing up to $1 billion over the next five years to become a cornerstone investor in a major wave of "debt-for-nature" swaps in developing countries.