LONDON -- The FTSE 100 (INDEX: ^FTSE) enjoyed another week of advance, gaining 48 points to end the week at 5,914, not far short of its 52-week high of 5,989. That's a rise of only 0.8% on the week, but if all our investments did that every week we'd be doing very well indeed.

There were some major ups and downs for individual FTSE 100 stocks, too. Here are four that have been making moves.

Antofagasta (ANTO -3.41%)
It was a good week for the big FTSE miners, with Antofagasta helping lead the way with a 59 pence (4.6%) rise to 1,347 pence. That's taken the price of the Chile-based copper miner up 36% since June, helping counter the slump that started in late 2010 because of faltering world commodities demand. The shares are at a forward P/E of around 15 for the full year, with a dividend yield of around 2.5% expected.

Lloyds Banking Group (LLOY -0.16%)
The U.K.'s two bailed-out banks have been flying of late, with Lloyds Banking Group powering up to a 52-week high of 47 pence this week. That's a rise of 85% since the end of May for the bank that's 40% owned by U.K. taxpayers. Lloyds recorded a massive loss of 3.5 billion pounds in 2011 and still lost 439 million pounds at the halfway stage this year, but it's finally expected to be back in profit for the full year to the tune of around 1.5 billion pounds.

Tullow Oil (TLW -2.93%)
The price of Tullow Oil slumped by 132 pence (9%) to 1,245 pence this week, taking the price of the global oil and gas exploration stock down 23% since its peak of 1,611 pence in late February. The trigger for this week's fall was the announcement, following press speculation, that the company's Zaedyus-2 appraisal well, offshore from French Guiana, had failed to find anything worth extracting.

Sage Group (SGE 0.61%)
Accounting and business management software maker Sage Group fell 16.5 pence (5.3%) to 295 pence, despite reporting full-year results that slightly exceeded expectations. Underlying pre-tax profit rose by 4% to 356 million pounds. And even though underlying earnings dropped by 2% to 19.9 pence per share, Sage lifted its dividend for the 21st year in a row, by 4% to 10.15 pence per share.

What now?
As usual, this week's FTSE trading provided some large share-price movements -- and perhaps some buying opportunities. Indeed, legendary investor Warren Buffett has spent more than $1 billion buying the shares of one of the U.K.'s most successful FTSE large caps.

Clearly, he thinks there are bargains to be had within Britain's stock market, and you can discover the details of his investment -- including the price he paid -- by reading this special report. The report -- "The One U.K. Share Warren Buffett Loves" -- is free and can be accessed immediately.

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