Bangladesh Bank has bought a total of $1.129 billion from commercial banks over the past one and a half months, crossing the $1 billion mark in its continued efforts to stabilise the exchange rate and ensure liquidity for remittance and export settlements.The central bank purchased $134 million from five banks on wednesday through a multiple price auction at rates ranging around Tk121.75, with the cut-off set at Tk121.75, Bangladesh Bank Executive Director and spokesperson Areif Hossain Khan confirmed.With this latest intervention, the central bank’s total dollar purchases since July 13 have reached $1.129 billion through nine auctions.Bangladesh Bank introduced the auction mechanism on July 13, when it bought $171 million at Tk121.50.This was followed by $313 million on July 15 at the same rate. On July 23, it purchased $10 million at a cut-off of Tk121.95.The bank went on to buy $45 million on August 7 at Tk121.35–121.50, $83 million ...