The US dollar sold for Tk118 on the interbank platform - highest rate since the Bangladesh Bank relaxed its grip on the exchange rate by letting the market mechanism determine the prices.
Banks previously bought each US dollar for Tk117.95, according to central bank data.
The central bank introduced crawling peg on May 8, allowing for limited fluctuations of the exchange rate within a predefined range.
As such, it shifted away from its previous practice under which banks announced rates of the greenback periodically.
The central bank move aims to contain the volatility in the forex market amid declining reserves.
The central bank launched the crawling peg for spot purchase and sale of the US dollar with the mid-rate at Tk117 per dollar and asked banks to buy and sell the American currency freely around the mid-rate.
Purchases started to be made at Tk116.46 on the first day after the launch of the crawling peg system.
The sales rate in the interbank transactions was Tk117.5 per US dollar.
Since then, the volatility in the forex market reduced but the taka weakened against the greenback steadily.
On May 30, the buying and selling rate was Tk117.50 and Tk117.90, respectively.
The greenback further gained ground this month.
