LONDON, Dec 10 ― London's exporter-heavy FTSE 100 inched lower yesterday as oil majors and Asia-exposed financials fell on China growth worries and as the pound strengthened, while a 72 per cent slump in Tullow Oil single-handedly dragged down midcaps.

The blue-chip index was gave up 0.1 per cent, with its dollar earners including spirits company Diageo and pharmaceutical giant AstraZeneca taking a hit from gains in sterling ahead of UK general election later this week.

The FTSE 250 midcap index was also down by the same level, with Tullow Oil recording its steepest one-day fall since early 2004 after the oil and gas explorer scrapped dividend and announced the exit of its CEO.

Yesterday's drop wiped off roughly half of Tullow's market cap, or £1 billion ($1.28 billion), as the stock tumbled to its lowest in 15-1/2 years. Rival Premier Oil also fell 8 per cent.

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Other news-related moves saw Tesco top the bluechip index with a 5 per cent rise after the retailer started a review of its operations in Thailand and Malaysia.

Helping limit losses on the midcap bourse was engineering firm Senior Plc, which jumped 7 per cent on news that it was reviewing options for its aerostructures business. Marks & Spencer added 3.5 per cent after a double upgrade from Goldman Sachs.

Elsewhere, China's exports in November shrank for the fourth consecutive month, fanning worries over the impact of the Sino-US trade war on the world's second-largest economy and overshadowing Friday's strong US jobs data.

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“The contrasting US and Chinese data should swing the trade negotiation pendulum back to neutral from the Chinese side amongst the world's trade watchers,” OANDA analyst Jeffrey Halley said.

Investors were also trying to size up the chances of a new round of US tariffs on US$156 billion worth of Chinese goods from December 15.

While signs of progress in the trade negotiations lifted the FTSE 100 to its biggest one-day gain since July on Friday, the bourse still marked its steepest weekly fall after contradictory messages from US President Donald Trump earlier on.

“More soothing noises on the negotiations emerged from Washington DC on Friday, but one gets the sense that this Sunday's next round of tariffs on China is no longer the line in the sand it once was perceived to be,” Halley said.

Yesterday, some of Britain's more domestically-exposed firms such as Lloyds and Barclays outperformed as investors bet on the Boris Johnson-led Conservatives to win the election this week and deliver Brexit.

“Three days to polling day and the polls are looking good for Boris Johnson..., although the spectre of tactical voting still lingers,” Raymond James analyst Chris Bailey said. ― Reuters