News: RIO UPDATE 1-European shares add to gains as trade war fears fade into background

• STOXX, STOXX50E up 0.3 pct
• Autos, banks, miners lead gains
• Kepler Cheuvreux upgrades autos sector
• Proximus up, traders cite Citi upgrade

(Updates prices, adds details, quotes)

European shares extended their rally on Thursday as investors set aside fears over a U.S.-China trade war and focused instead on bullish macroeconomic and corporate news.

The pan-European STOXX 600 .STOXX was up 0.3 percent while the leading euro zone stock index .STOXX50E was on track for its ninth straight session of gains, also up 0.3 percent.

Autos .SXAP , banking .SX7P and mining .SXPP sectors led gains as investors stayed resolutely focused on hopes that the latest escalation in the trade war would drive the dispute into endgame.

Autos gained 1.1 percent, also helped by Kepler Cheuvreux upgrading its recommendation on the sector.

Tyre maker Continental CONG.DE and car parts supplier Valeo VLOF.PA were top of the DAX and the CAC 40 respectively.

"On autos, valuations have reached historically low levels, pricing in a lot of bad news already," wrote Kepler Cheurvreux strategists.

Shares in Belgian telecoms company Proximus PROX.BR climbed 3 percent, with traders saying Citi had upgraded its recommendation on the stock.

Inmarsat ISA.L shares rose 1.9 percent after the British satellite company said it would collaborate with Japan’s Panasonic Avionics to provide in-flight broadband for commercial airlines.

Lower levels of market volatility, meanwhile, hurt quarterly revenue at trading platform IG Group IGG.L , sending the stock down 8 percent to the bottom of the STOXX.

Belgian biotech firm Argenx ARGX.BR fell 4.2 percent in a second day of losses after a share offering.

Markets have shrugged off an escalation on Tuesday of the tariff war between the United States and China, focusing rather on the tariff levels being lower than expected and on hopes that the dispute may be nearing an end.

"Financial markets are likely to focus on the potential for an agreement between U.S. and Chinese officials that could reverse these tariffs," wrote Goldman Sachs analysts.

An increase in U.S. and German borrowing costs also left stock markets unscathed.

"For now stock markets appear to be largely indifferent to this gradual rise in borrowing costs," said Michael Hewson, chief market analyst at CMC Markets.

Some put the move down to market technicals. "As the market goes up, those long cash and downside protection have to chase it," said a trader.

Investors have been raising their cash buffers, Bank of America Merrill Lynch's September fund manager survey showed on Tuesday.

On the small-cap front, German fashion retailer Tom Tailor TTIGn.DE issued a profit warning, sending its shares down 12 percent. The firm blamed Europe's exceptionally hot and long summer for slower growth.