Istanbul's stock exchange suffered its biggest one-day loss in a decade as it closed down 10.5 percent lower as anti-government protests stretched into the country, CNN Turk reported. Investor concern mounted and the Turkish lira weakened to 1.885 against the dollar. After tens of thousands more protestors took to the streets as the wave of anti-government sentiment spread throughout the country, Turkish Prime Minister Tayyip Erdogan accused opposition parties of provoking the unrest.