SINGAPORE  - The dollar inched lower on Tuesday as growing optimism about a global recovery from the COVID-19 pandemic supported riskier currencies, though concerns about Sino-U.S. tensions held further moves in check.

After a quiet start to the week due to holidays in Britain and the United States, the greenback was a fraction softer against most Asian currencies.

Against a basket of currencies the dollar was roughly where it ended last week, holding at 99.692. The Japanese yen  fetched 107.79 per dollar.

The Australian and New Zealand dollars rose about 0.3%, but kept below last week's highs even as stock markets forged ahead.

"Markets are caught between two conflicting currents," said Michael McCarthy, CMC Markets' chief strategist. "Rising tensions between China and the U.S. are raising concerns, while easing COVID-19 lockdown measures are fuelling growth optimism."

The Chinese yuan, a barometer of relations between the world's two biggest economies, firmed a bit to 7.1427, though it remains near a two-month low of 7.1465 hit on Friday.

The Australian dollar was steady at $0.6559, and the kiwi at $0.6112.

ANZ Bank upgraded its forecasts for the Antipodean currencies, but still expects both to fall, with the Aussie forecast at $0.60 and the kiwi at $0.55 in December.

"At current levels a global recovery is in the price, and we believe it's a question of when, not if, depreciation resumes," ANZ analysts said in a note on Tuesday.

Trade, the handling of the pandemic and China's move to impose laws on Hong Kong are all seen as potential catalysts for a further deterioration in already testy U.S.-China relations.

The latest salvos came over the weekend, with White House National Security Adviser Robert O'Brien warning of potential sanctions if Hong Kong's autonomy was undermined, and China's top diplomat Wang Yi criticising U.S. attacks as a "smear".

A third downgrade in Singapore's growth forecast also provided a fresh reminder of the pandemic's devastating impact on the global economy. The trade-exposed city-state expects gross domestic product to contract between 4% and 7% this year.

Still, from Europe to Japan, restrictions on businesses and movement are lifting and barring a second wave of infections, there is plenty of hope for a swift return to growth.

Together with low interest rates, and talk of them heading even lower, the calmer conditions had some investors on the lookout for carry trades.

The British pound rose 0.3% to $1.2215 and the euro tacked on 0.2% to $1.0908. Both currencies lost between 4% and 5% on the Mexican peso and Brazilian real last week.

"We've got the perfect ground right now for Mexican peso or Brazilian real outperformance," said Chris Weston, head of research at Melbourne brokerage Pepperstone. "It's basically choose your carry vehicle, or funding currency, and get paid."

(Reporting by Tom Westbrook) ((tom.westbrook@tr.com; +65 6318 4876;))