New York (AFP)

The main indices of the New York Stock Exchange again broke records on Friday, investors were reassured by the persistence of commercial optimism and indicators considered solid for the American economy.

Its flagship index, the Dow Jones Industrial Average, gained 0.28% to close at 28,455.09 points.

The Nasdaq, with a strong technological coloring, rose by 0.42% to finish at 8,924.96 points.

The broad S&P 500 index appreciated by 0.49% to 3,221.22 points.

The New York market closed a week which saw the Dow Jones gain 1.2%, the Nasdaq to grow 2.1% and the S&P 500 to rise 1.5%.

"Once a record is reached, it doesn't take much to get a new one," notes Art Hogan of National.

Market participants welcomed a comment from US President Donald Trump on Twitter on Twitter saying "very good discussions with Chinese President Xi (Jinping) about our giant trade deal."

According to the tenant of the White House, the date of the formal signing of the text is being finalized.

The preliminary agreement between Washington and Beijing could remove the specter of customs surcharges, which have poisoned trade relations between the two countries for more than a year and a half.

"The tariffs have probably risen to their highest. It is likely that there will be fewer tariffs in 2020 and, hopefully, more investment," said Hogan.

Investors have also digested several reassuring indicators for the world's leading power.

The growth of the US economy was confirmed at 2.1% in the third quarter, a fairly sustained pace driven by household consumption while the deterioration in business investment turned out to be less significant than previously announced.

The growth recorded for July-August-September is in line with analysts' expectations.

Annual inflation in November was 1.5%, up slightly from October levels, but still far from the 2% target the US Central Bank considers healthy for the economy .

On the bond market, the 10-year Treasury bill rate fell slightly around 9:30 p.m. GMT, to 1.917% against 1.920% on Thursday at the close.

© 2019 AFP