Euro Currency Index summer of 2007, the index began to decline. On 6 February 2009 a value of 187.84 points was determined. In the following eight months, the European single currency rebounded from the lows. On 13 October 2009, the index rose by 208.45 points, near its historical high point. A financial crisis in several member states of the Euro zone in 2010 led to the outbreak of the Euro crisis. Particularly affected is Greece (see Greek government-debt crisis from 2010), but also other countries such as Ireland, Spain, Italy and Portugal. The weakness of the Euro against almost all global currencies caused
Greek drachma in Alexandria and the Parthian Empire based in what is modern-day Iran. The Arabic unit of currency known as "dirham" (), known from pre-Islamic times and afterwards, inherited its name from the drachma or didrachm (, 2 drachmae); the dirham is still the name of the official currencies of Morocco and the United Arab Emirates. The Armenian dram () also derives its name from the drachma. It is difficult to estimate comparative exchange rates with modern currency because the range of products produced by economies of centuries gone by were different from today, which makes purchasing power parity (PPP) calculations