* Dollar hit 5-1/2-year low against Swiss franc, 5-month low against yuan
* Kiwi lags broad rally as easing expectations grow
* AUD/NZD crosses 1.10 for the first time in two years
* Graphic: World FX rates in 2020 https://tmsnrt.rs/2RBWI5E
By Tom Westbrook and Eimi Yamamitsu
SINGAPORE/Tokyo, Aug 18 (Reuters) - The dollar extended its fall to hit fresh lows against a range of currencies on Tuesday, after a triple blow of retreating yields, soft U.S. economic data and a dip in safe-haven demand exerted broad selling pressure.
The yuan firmed to 6.9246 per dollar, hitting a level unseen since March 9, despite the Trump administration flagging a further tightening of restrictions against Chinese tech gear maker Huawei.
Against the Swiss franc, the dollar fell more than 0.1% to fresh 5-1/2 year low of 0.9049.
"The background factor for the moves we're seeing today is the overall weakness of the dollar," said Shinichiro Kadota, senior strategist at Barclays. "And the Swiss franc strengthened because of a euro-led decline in the U.S. dollar since July."
The greenback is also poised to re-test multi-month or multi-year troughs against the euro, pound and Aussie made earlier in the month.
The euro last sat at $1.1891, just below a recent two-year high of $1.1916.
The Aussie rose 0.12% to $0.7225, near an 18-month top of $0.7242 hit on Aug. 7, as the Reserve Bank of Australia reaffirmed the outlook of steady policy.
The Aussie's gains were capped by news China had begun an anti-dumping investigation into imports of wine from Australia.
Investors have been relieved by a delay in the review of the U.S.-China trade deal this week, which has left the agreement standing and reinforced a belief the trade relationship can hold even amidst conflict on multiple other fronts.
A fresh rally in tech stocks added to the positive mood, and together with a pullback in U.S. yields and a weak reading in a U.S. manufacturing survey has many traders sticking to their bearish convictions on the dollar.
Net bearish bets on the U.S. dollar grew to their largest since May 2011 last week and spot trade in recent days suggest the position has only grown further since.
"Extended short dollar positions risk a sharp pull back if the dollar downside stalls further, but for now the negatives for the dollar are mostly still in place," said analysts at Singapore's OCBC Bank.
"We are reduced to staying in the game while the music is playing."
On the data front, the New York Fed's Empire State business conditions index tumbled to 3.7 in August from 17.2 in July - far lower than the 15 points forecast by a Reuters survey.