By Sara Sjolin, MarketWatch

LONDON (MarketWatch) -- Shares of consumer-goods firm Reckitt Benckiser Group PLC and heavyweight miner BHP Billiton PLC led gainers in London on Tuesday after the companies gave well-received updates about expected performance in the full financial year.

The FTSE 100 index gained 0.6% to 6,695.66, marking a ninth straight day in positive territory.

Reckitt Benckiser rallied to the top of the index, up 5.2%, after the company said it expected full-year revenue growth to be at least 6% and full-year margins to be maintained. This updates an outlook from July, when the firm lifted its expectation for revenue growth to the upper end of 5%-6% range, while maintaining adjusted operating margins. Reckitt Benckiser's brands include Calgon, Finish, Dettol and Durex.

BHP Billiton PLC (BHP) climbed 4.1% after raising its outlook for iron-ore production for the fiscal year. The miner also reported record output from its expanding mining hub in Australia's resource-rich Pilbara region.

Other mining firms showed the same positive moves and tracked most metals prices higher. Shares of Fresnillo PLC added 2.9%, Anglo American PLC gained 1.3% and Rio Tinto PLC (RIO) up 0.6%.

Among other notable movers, ARM Holdings PLC (ARMHY) lost 3.4% even as the processor designer said it has a record backlog of orders going into the final fiscal quarter. It also posted a rise in third-quarter profit on forecast-beating revenue, powered by global demand for smartphones.

GKN PLC gained 1.7% after the auto- and aerospace-components firm said third-quarter sales increased 16%.

Also of interest in the U.K. equity space, TCS Group Holdings, which owns one of Russia's major consumer-lending and credit-card companies, on Tuesday priced its initial public offering on the London Stock Exchange at $17.50 per global depositary receipt, giving it a market capitalization of $3.2 billion. The company expects to raise nearly $1.1 billion in the offering, making it the second-biggest IPO in London so far this year, following Royal Mail PLC's $2.8 billion offering earlier this month.

On the data front in London, the Office for National Statistics said public-sector net borrowing, excluding temporary effects of financial interventions, fell to 11.1 billion pounds ($17.9 billion) in September, down GBP1 billion from the same month last year.

The number was smaller than expected, and Rob Wood, chief U.K. economist at Berenberg, said in a note that "strengthening growth, rising employment and a sharply improving housing market mean there is a decent chance that the fiscal deficit will undershoot official forecasts this year and next."

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