* Platinum slips from over 4-yr high, but set for 2nd weekly gain
* Interactive graphic tracking global spread of coronavirus: https://tmsnrt.rs/3mvcUoa (Adds comments, details, updates prices)
By K. Sathya Narayanan
Jan 22 (Reuters) - Gold prices fell as much as 1.8% on Friday as a broader market sell-off weighed on the metal along with a firm dollar, while hopes for further stimulus from the U.S. kept bullion on track for its first weekly gain in three.
U.S. gold futures
"Regardless of the asset class everything from equities to agricultural to softs are selling off and a lot of emphasis is on whether the stimulus could be passed and whether the (COVID-19) vaccine rollout could be effective," said Phillip Streible, chief market strategist at Blue Line Futures in Chicago.
The strength in the dollar was also weighing on bullion with benchmark U.S. Treasury yields firm above 1%, Streible added. [US/]
U.S. President Joe Biden has proposed a $1.9 trillion coronavirus relief plan, though some Republicans expressed concerns over the amount.
Global equities benchmarks slipped off record highs and grains futures fell, while the dollar edged higher against key rivals. [MKTS/GLOB]
"As a result, the price differential to gold narrowed for a time to $720 per troy ounce. The last time it was any lower was in February last year," said Commerzbank analyst Carsten Fritsch in a note.
"There was no specific trigger for the price surge. The price may have been pushed up by technical buying after it exceeded its previous high at $1,130."
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