Major corporate news saw a major mining group announce strong earnings and a share buy back, which boosted the mining sector as a whole around the middle of the month.

主要的公司新闻包括一个重要煤炭开采集团公布了强劲的盈利数据以及股票回购方案，推动煤炭开采板块在月中整体走高。

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Sometimes this will mean selling equity, a galling experience for those who spent a fortune on share buy-back programmes just a year or two ago.

有时这将意味着出售股权，这对于那些只是一年或两年以前花了大量资金回购股票的公司来说实在是一个难堪的经验。

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Berkshire Hathaway's slumping share price soared after its board decided to buy back some of the firm's own stock.

在董事会决定回购其部分股票后，美国保险公司伯克希尔•哈撒韦公司不断下滑的股价飙升。

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But a recent exit of a short-term venture capital partner, and a significant share buy back by Kaspersky ownership means that the initial idea of listing shares has been shelved.

FORBES: Internet Security Co Kaspersky Lab Shelves IPO Idea

Shareholders too may prefer a share buy-back to the uncertain pay-off from an investment programme.

ECONOMIST: American profits have been high but the trend may not last

IBM's results on April 29th, combined with news of a huge new share buy-back, sent its shares up by more than 5%.

ECONOMIST: Wall Street