Citigroup has launched a block deal to sell shares in cosmetics-to-fashion retailer Nykaa worth ₹1,000 crore, CNBC Awaaz reported. The block deal involves TPG Capital as the seller, with the deal offering a discount of up to 0.5% on the current market price. Citigroup had last week too completed a block deal to sell 0.6% shares worth ₹306 crore.