Barclays dropped almost 9% after it recorded a 2% fall in pre-tax profits over 2015.
Wall Street gains ground after oil prices rebound and Asian markets shrug off disappointing economic data.
There are plenty of opportunities for investors to capitalise on fears that Britain will leave the EU.
People's Bank of China has cut the reserve requirement ratio for banks by 50 basis points.
ICE appoints financial advisory firm, Morgan Stanley, to prepare a higher offer for the LSE merger.
The Dow Jones also closed down 123.47 points, or 0.7%, to settle at 16,516.50.
The G20 countries left their meeting on Saturday without a proposal to boost the slowing global economy.
Wall Street was largely unchanged as investors were left disappointed by the lack of action from the G20.
China's overproduction has been blamed for the downturn in coal and steel prices.
Policymakers at the G20 meeting failed to come out with any action that could spur global growth.
Lord Bilimoria, founder and chairman of Cobra Beer, writes about India's economy
Glencore and Anglo American lead FTSE 100 risers but RBS plunges after posting £1.9bn loss on litigation charges.
Wall Street on track for weekly gain as US stocks eye third consecutive day in the black after oil rebounds.
Halliburton has let go around 22,000 employees since 2014, which translates to about 25% of its workforce.
Zhou Xiaochuan said Beijing still had the room and tools to support the country's economy.
Crude oil settled up 2.86% at $33.07 after several major oil producers agreed to meet in March.
Lloyds leads FTSE higher as European stocks rally despite decline in oil prices and weak session in Asia.
Wall Street moves higher as investors shrug off dismal Chinese session and decline in oil prices.
Investors are looking forward to the G-20 meeting in Shanghai scheduled for 26 February.
The Dow Jones, S&P 500 and Nasdaq composite all close up less than 1%.
BHP, Rio Tinto, Anglo American and Glencore all firmly in the red as FTSE sinks, while oil prices tumble again.
As fears over negative interest rates grow, gold is becoming an attractive investment.
Saudi Arabia's Oil Minister Ali al-Naimi says there is 'no sense wasting our time seeking production cuts'.
Ali al-Naimi's warning seemed to be directed at Russia and Iran.
Stocks suffered after Saudi Oil Minister Ali al-Naimi said proposed production costs will take place.
Standard Chartered and BHP drag FTSE lower as oil prices tumble again, while LSE shares soar after merger talks.
All Asian indices were trading lower despite an increase in WTI crude oil prices.
Further stabilisation in China, where the yuan has held steady, also helped US stocks rally.
Oil output in the US will decline over the next two years before reaching all-time high, according to the IEA.
Japanese manufacturing PMI falls to 50.2 in February from 52.3 in the previous month.