The rupee inched up 1 paisa to 83.43 against the US dollar in early trade on Thursday on the back of a weak American currency and positive domestic equity markets. Forex traders said an upward movement in the crude oil prices resisted a sharp rise in the Indian currency even as investors moved cautiously ahead of the RBI's monetary policy decision to be announced on Friday. At the interbank foreign exchange market, the local unit opened at 83.40 and slipped to 83.43 against the greenback, trading 1 paisa higher from its previous close. On Wednesday, the domestic currency settled 7 paise higher at 83.44 against the dollar. Meanwhile, the dollar index, which gauges the greenback's strength against a basket of six currencies, was trading 0.15 per cent lower at 104.06. Analysts attributed the weakness in the dollar index to a sharp fall in US Treasury yields after the latest data showed private sector job growth in May was slower than estimated, raising expectations of an interest rat