Explainer: Hong Kong's currency finds strength in testing times

HONG KONG (Reuters) - The Hong Kong dollar is bumping against the top end of its narrow 7.75-7.85 band against the U.S. dollar and is among the best-performing currencies this year even as the city's economy struggles to contain the fallout of the coronavirus.The Hong Kong Monetary Authority (HKMA) spent HK$7.7 billion (799.5 million pounds) last week to defend the peg as the currency rose to its upper limit for the first time in more than four years.Analysts say what's driving the currency is..