By Tamas Csonka in Budapest Hungary’s forint plummeted to historically weak levels against the euro and the dollar on concerns about the National Bank (MNB) ending its tightening policy too early on September 27. There are also worries over the country’s foreign currency reserves falling sharply as the current account deficit is widening due to rising import bills and the impact of the strong dollar on emerging market currencies. On Thursday, the EUR/HUF rate weakened from 414 to 424, while the USD/HUF rate peaked at 437.4 from 424, a decline of more than 2%. The Hungarian currency has become …