Markets were waiting to see if Yellen will indicate whether the Fed is on track to make a third rate hike this year.
The yen's weakness was also noticeable on the crosses as the the Bank of Japan reiterated its stimulus plans on Monday after the central bank showed its determination last week to defend its commitment to keep the 10-year yield around zero percent.
The New Zealand dollar was little changed, having traded in a 0.50 USA cent range for the past week, as traders await testimony from Federal Reserve chair Janet Yellen and United States inflation data to provide fresh impetus to the ...
Yellen is due to testify before the House Financial Services Committee on Wednesday and before the Senate Banking Committee on Thursday.
The Dow edged down 5.82 points or less than a tenth of a % to 21,408.52, but the Nasdaq climbed 23.31 points or 0.4% to 6,176.39 and the S&P 500 inched up 2.25 points or 0.1% to 2,427.43. However, Shanghai eased 0.3 percent and Singapore gave up 0.6 percent.
Markelle Fultz tells fans 'I'm ok' after injury scare
There's just too much positive happening in Philly right now for it to end before they even get off the ground. Fultz was helped off the court after rolling his left ankle in a game against the Golden State Warriors .
Chair Janet Yellen will submit Federal Reserve's semi-annual Monetary Policy Report to Congress on Wednesday.
The dollar index.DXY, which tracks the greenback against six major rivals, was up 0.06 percent to 96.082.
In a section on financial stability, the Fed again acknowledged that valuation pressures are on the rise, but seemed content as asset-market gains haven't led to increased borrowing outside of the financial sector.
Investors are also eyeing the start of the USA corporate earnings season.
The stock rose 1.5% in premarket trading on Tuesday.
Afghanistan's All Girl Robotics Team Denied Visas For Global STEM Competition
One of the robot makers, 14-year-old Fatemah, joined her teammates to finish making the machine. In the meantime, they built their robot out of home materials, just in time for the competition.
NZ rates were significantly higher on Friday, with the 2-year swap rate up 3 bps to 2.32% and the 10-year rate up 8 bps to 3.405%.
PepsiCo lost 1.3 per cent after reporting a five percent rise in second-quarter earnings to US$2.1 billion.
"The pullback in gold has coincided with the rise in USA real yields to the year's highs as well as the sharp increase in real yields in Europe to the highest levels in more than a year", UBS analysts said in a note.
"But we are at the lower end of the range for gold prices".
Elsewhere, silver gained 0.4 percent to $15.69 an ounce, palladium ceded 0.3 percent to $836.99 and platinum slid 0.5 percent to $895.7.
Gunman Dead in Bronx Hospital Shooting
The Bronx-Lebanon Hospital in the Bronx borough is among the largest providers of outpatient services in NY . The body of a woman who was shot was found near the body of the shooting suspect, the officials tell CNN.
Sterling slipped to a near two-week low against the dollar and the euro after a speech by Bank of England Deputy Governor Ben Broadbent left the outlook for interest rates unanswered.