LONDON -- What a tough week for the FTSE 100 (FTSEINDICES: ^FTSE) it's been! Fears of Chinese overheating have continued, and together with the tapering of quantitative easing and a couple of tough sets of results from U.K. companies, London's top index has taken another battering. It lost 153 points (2.3%) to end Friday at 6,510, and that follows on from a 166-point drop the previous week.

Here's a look at some of the week's biggest movers.

Antofagasta (ANTO -0.03%)
The miners are back in favor these days, and a Q4 2013 production report from Antofagasta helped push its stock up 43.5 pence (5.4%) to 850.5 pence.

The company reported record copper production for the year of 721,200 tonnes, with 182,900 tonnes of that coming in the fourth quarter for a 4.9% rise. Gold production in the quarter was up 6.4% to 63,300 ounces, but over the year it fell 2% to 293,800 ounces.

After an upbeat start to 2014, the Antofagasta price is now down 25% over 12 months -- it did fall as far as 35%.

British Sky Broadcasting (SKY)
Satellite TV provider British Sky Broadcasting gave us a first-half report this week, and saw its stock gain 24 pence (2.8%) to 876 pence in response.

In the six months to Dec. 31, Sky saw adjusted revenue up 7.6% to 3,751 million pounds. And though adjusted earnings per share dropped 3.5% to 27.3 pence, the interim dividend was lifted by 9.1% to 12 pence.

The company also enjoyed record growth in high-definition TV boxes, with 4.4 million now installed.

BG Group (LSE: BG)
Shares in BG Group crashed on Thursday, after the oil and gas supplier issued a profit warning. The price was down 233 pence (19%) to 1,022 pence by Friday, for the biggest FTSE 100 fall of the week by far.

Production for the year of 590,000 to 630,000 barrels of oil equivalent per day, or boepd, is now expected, down from analysts' earlier forecasts of 660,000, and the firm has cut its 2015 target from 800,000 boepd to a range of 710,000 to 750,000.

Part of the cause is Egypt's diverting more gas to its domestic market than agreed, but there has also been a decline in production in the United States.

Diageo (DGE 0.05%)
Shares in Diageo, the owner of such iconic drinks brands as Guinness and Smirnoff, lost 146 pence (7.5%) to 1,801 pence during the week after a first-half update told of "a more challenging emerging market environment" -- emerging-market sales grew just 1.3%. Overall we saw a 1.8% rise in net sales in the half, but that was down from 2.2% at Q1 time.

Operating profit was up 9% with earnings per share up 4% to 62.6 pence, and the interim dividend was lifted 9% to 19.7 pence per share.

What now?
Dividends form a core part of many a successful long-term portfolio. Whether you need that income to live on, or want to reinvest it for the long term, there's nothing wrong with collecting robust and attractive payouts. And that's what the Fool's top U.K. analysts have been looking for.

Their new "How to Create Dividends for Life" report gives you Five Golden Rules for Building a Dividend Portfolio. The full in-depth report is free and can be accessed immediately -- just click here.

The Motley Fool is helping Britain invest. Better. And with the economy so uncertain, we're urging everyone to read "10 Steps to Making a Million in the Market" -- it may transform your wealth. Click here now to request your free, no-obligation copy.

Further Motley Fool investment opportunities: