The rupee plunged by 16 paise to close at an all-time low of 82.33 against the US currency in early trade on Thursday due to a surge in US bond yields, risk-averse sentiment among investors, and firm crude oil prices. At 9.30 am, the home currency was trading at 82.30 a dollar, down 0.5% from its previous close of 81.89. The currency opened at 82.19 and touched an all-time low of 82.33.