The dollar rose against the euro after concerns surrounding Deutsche Bank caused general unease over Europe's banking sector.
The dollar fell against the yen after comments from a top BOJ official and uncertainty from impending U.S. presidential debate.
Some strategists expect the Japanese yen to gain ground against the dollar if Trump wins tonight's presidential debate.
The dollar index edged higher on Friday, reversing earlier selling, after comments from Boston Fed Reserve President Eric Rosengren.
The dollar was mixed after a Fed meeting that balanced hints of a rise in interest rates this year with cuts in the longer term outlook.
The dollar extended losses against a basket of major currencies after the U.S. Federal Reserve left monetary policy unchanged.
Fitch Ratings' Sabine Bauer says Hong Kong banks face growing risks by lending across the border and by having exposure tied to China's yuan volatility.
The dollar edged up against major currencies on Tuesday in light trading as investors retraced last week's moves ahead of meetings.
Eswar Prasad, Brookings Institute, and "Gaining currency - the rise of the renminbi," author, discusses whether China's currency threatens the U.S. dollar, and how a Donald Trump presidency could impact China-U.S. relations.
The dollar fell with a stronger oil price the chief theme in a market battening down the hatches ahead of Fed and BOJ meetings.
Hong Kong's overnight yuan borrowing rate was fixed at the highest level in eight months on Monday after the long holiday weekend.
MCM Partners' Ryan Roberts says there are concerns in the Chinese market, including the overheated housing market, valuations and capital controls.
The dollar was on course to fall after U.S. retail sales data quelled lingering bets on the Fed raising interest rates next week.
The U.S. dollar reversed earlier gains against the yen on Thursday as traders doubted that the Bank of Japan (BOJ) would be able to weaken the yen.
The U.S. dollar eased against the yen on Wednesday after skepticism grew that the Bank of Japan would intensify its stimulative monetary policies.
The U.S. dollar gained against the yen and riskier commodity currencies such as the Australian and New Zealand dollars on Tuesday.
Increased flexibility in the Chinese yuan is likely to further fuel Chinese investments in overseas real estate, says Oscar Chan, regional director at JLL.
Goldman Sachs identifies Chinese and Hong Kong themes for investors to capitalize on before the year-end.
The Shenzhen Connect is likely to see an increase in northbound trading, says Ken Wong, Asia equity portfolio specialist at Eastspring Investments.
The dollar fell against the safe-haven yen as uncertainty surrounding a potential Fed rate hike this month fueled a selloff in riskier currencies.