The yen and the euro rose on concerns about China, as investors unwound bets against the two currencies used to fund holding riskier assets.
The dollar lost ground against the yen and the euro as global stock markets began the week in the red, prompting investors to trim bets.
The dollar rose to one-week highs on Friday.
The dollar advanced for a third consecutive session on Thursday, bolstered by data showing a much stronger U.S. economy.
The dollar rallied for a second straight session on Wednesday.
The dollar rose on Tuesday, earning a breather from a slide to seven-month lows against the yen as U.S. Treasury bond yields climbed higher.
The euro hit a 6 1/2-month high and the yen struck a peak against the dollar as investors flocked to safe haven currencies.
Following calls for parity against the dollar just a few months ago, the single currency is now one of the few assets in the world rallying.
The dollar tumbled more than 1 percent against the euro and the yen on Friday.
August’s wave of currency interventions could just be the start of a “race to the bottom,” with several major emerging markets looking set to devalue in the near-future.
The dollar fell against a basket of major currencies, with investors trimming bets in its favor.
The dollar fell on Wednesday as investors positioned for a U.S. interest rate hike in September pulled back.
The dollar rose against a basket of currencies for a third trading day running, as worries about a China-led "currency war" abated.
Emerging markets currencies took it on the chin Monday and one analyst has told CNBC that the selling will only intensify.
The dollar rose against a basket of currencies on Friday as U.S. producer prices in July hinted some pickup in inflation.
The U.S. dollar recovered on Thursday after China's central bank said there was no basis for further yuan depreciation and on U.S. data.
The U.S. dollar fell on Wednesday to its lowest in about a month against a basket of major currencies.
The yuan suffered its biggest fall in over two decades on Tuesday.
The dollar slipped from a nearly four-month high after comments stoked uncertainty over whether the Fed would hike rates in September.
The slump in EM currencies could persist well past the Fed's first rate rise, due to Chinese economic weakness and commodity prices that have yet to bottom out, analysts have warned.