Thomas Cook shares sink again as Citi sees stock hitting zero after latest alert

LONDON (Reuters) - Thomas Cook Group shares sank by nearly a third on Friday and bonds hit a record low after Citi downgraded its rating to 'sell' and cut its target price on the stock to zero, a day after the company's latest profit warning. Shares in the world's oldest travel company, battered by fading demand for its package holidays and high levels of debt, hit their lowest since July 2012 and were on track for their biggest one-day drop since November 2011. The 2022 euro-denominated bonds..