"The rupiahs exchange rate depreciated against the US dollar along with the weakening of exchange rates in Asia," economist Rangga Cipta of Samuel Sekuritas said.
He said sentiment towards the upward revision of the US second-quarter gross domestic product growth was one of the factors causing the dollar to appreciate against several global currencies.
Data for US inflation rate, which is projected to increase, has boosted the dollar to move into the positive zone, Rangga explained.
After all, the relatively stable and rising crude prices and domestic optimism about the tax amnesty program has prevented the rupiah from falling further, he added.
"The condition will make the rupiah depreciate against the dollar only in a short term," he said.
Money market expert Rully Nova of Bank Woori Saudara Indonesia Tbk said the rupiahs depreciation is relatively limited following the market expectation of a low inflation rate in September this year.
"It is expected the data for inflation rate will be released early next week (Monday)," he said.(*)