Updates prices as of 0439 GMT

By Pablo Sinha

May 20 (Reuters) - Gold prices slipped on Wednesday to their lowest point in 1-1/2 months, as high Treasury yields and a firm dollar outweighed optimism over a potential U.S.-Iran peace agreement.

Spot gold XAU= was down 0.4% at $4,464.64 per ounce, as of 0439 GMT, having touched its weakest level since March 30. U.S. gold futures GCcv1 for June delivery lost 1% to $4,466.40.

"Gold is running out of puff somewhat against this backdrop of rising yields, and a dollar which has a spring in its step courtesy of the hawkish shift in the rates outlook," said Tim Waterer, chief market analyst at KCM Trade.

The dollar hovered at a six-week high, making greenback-priced bullion more expensive for holders of other currencies. USD/

Benchmark 10-year U.S. Treasury yields US10YT=RR were steady at a more than one-year high, raising the opportunity cost of holding non-yielding gold. US/

U.S. signals on Iran remained mixed, with President Donald Trump warning Washington may still need to strike Tehran, while Vice President JD Vance said both sides were making progress and did not want a return to conflict.

Philadelphia Federal Reserve Bank President Anna Paulson said the current level of interest rates is appropriate for the moment, putting downward pressure on inflation at a time when price pressures remain elevated.

She, however, said it was "healthy" that investors had begun considering scenarios where rates might need to rise.

The U.S. Federal Reserve will avoid cutting rates this year, according to most economists polled by Reuters who largely pushed long-held calls for reductions into next year on hopes the current inflation flare-up is temporary.

Investors are waiting for minutes from the Fed's April policy meeting, due later in the day, to gauge the U.S. central bank's monetary policy outlook.

Spot silver XAG= fell 0.3% to $73.59 per ounce, platinum XPT= slid 0.3% to $1,917.18, while palladium XPD= rose 0.7% to $1,366.35.