Citigroup reported core income of $3.66 billion for Q1 2001, a 7% decrease from Q1 2000. Excluding investment activities, core income rose 7% year-over-year. Global Consumer saw core income increase 18% to $1.78 billion driven by growth in US banking and lending. Global Corporate core income declined 7% to $1.75 billion due to weaker investment markets, though revenues grew 11%. Overall, Citigroup achieved solid results despite challenging markets due to the strength and diversity of its businesses.