Citigroup Inc. is facing significant financial headwinds as its stock price has dropped over 30% since last June, coupled with potential losses of $4 billion linked to its $10 billion exposure in Ukraine. Amid these challenges, questions arise about the bank's ability to continue share buybacks this year. In a bid to reinforce its sustainability initiatives, Citigroup has begun rolling out recycled PVC plastic credit cards, aiming for net zero emissions in operations by 2030.