NEW YORK, Feb 4 (Reuters) - Citadel's flagship fund

Wellington was up 1.4% in January, as investors were dealing

with choppy markets amid U.S. President Donald Trump's new

policies and a tumble in Nvidia ( NVDA ) caused by Chinese

startup DeepSeek, a source familiar with the matter said,

declining to be identified because the information was private.

All Citadel's four investment strategies posted positive

performances last month, the source added.

The firm declined to comment on the matter.