June 23 (Reuters) - Rio Tinto RIO.AX RIO.L on Friday completed its planned bond buyback, reducing gross debt by $2.5 billion, and said the early redemption costs are likely to reduce first-half underlying profit by about $180 million.
The early redemption costs are also expected to reduce the miner's cash flow from operating activities by about $260 million in the first half ending on June 30, the company said. Tinto on June 7 had detailed pricing for a $781 million cash tender as part of the bond buyback that will reduce its debt.