NEW YORK/FRANKFURT (Reuters) - Buyout firm Carlyle Group Inc has delayed the U.S. initial public offering (IPO) of its German specialty chemicals group Atotech, concerned that the coronavirus outbreak would negatively impact the valuation it could achieve with investors, people familiar with the matter said on Friday. Carlyle's decision highlights the uncertainty that the spread of the virus in China and around the world has brought to financial markets, with the benchmark S&P 500 Index on..