The Louis Dreyfus Commodities Alpha Fund, managed by Geneva-based Ian McIntosh, stopped accepting new money from investors after assets advanced 20-fold in about two years, according to people close to the fund.

The fund started with $100m in November 2008 and focuses mainly on farm products including grains, oilseeds, sugar, coffee and cocoa. It has now $2bn under management.

Louis Dreyfus Group is the worldâ??s largest rice and cotton trader. It was founded about 160 years ago, trades grains, oilseeds, sugar, ethanol, coffee and cotton, and has offices in more than 55 countries.