Officials arrested executives of some Zimbabwean companies for increasing prices on their products,[15][16] and economists reported that "chaos had started to reign and people in the public sector has becoming frantic".[17] On 6 September 2007, the Zimbabwe dollar was devalued again by 92%,[18] creating an official exchange rate of ZW$30,000 to US$1, although the black market exchange rate was estimated to be ZW$600,000 to US$1.[19]