On July 26, the Poloniex exchange announced the delisting of nine cryptocurrencies, FLO, FLDC, XVC, BCY, NXC, RADS, BLK, PINK, and RIC. They have not provided any specific reasons as to why the currencies have been delisted. Over the last four days, the delisted currencies have dropped about 50% each, with Riecoin (RIC) dropping nearly 90%. Poloniex users who have any of these currencies in their wallet can trade until August 2 and can withdraw until September 2. You can see the original tweet here.