At 0845 GMT, the pound was down 0.4% against the dollar at $1.12750 pence , and down 0.18% versus the euro at 87.220 pence <EURGBP=D3.
Wednesday's CPI data showed the consumer price index (CPI) increased by 10.1% in annual terms in September, in a new blow for households grappling with a cost-of-living crisis.
The U-turn on the fiscal plans prompted traders to curb their bets on the Bank of England raising interest rates.
Truss has so far defied calls for her resignation, though markets are increasingly considering the possibility of her imminent replacement.
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