Glencore's chairman announced he's buying shares and the stock is having another surge day

After a major slump on Monday that cut its share price by a shocking 29%, some of mining giant Glencore's top brass is making a public display of confidence in the firm.

Tony Hayward, the company's chairman, just bought 100,000 shares priced at £0.91 each. That's according to a regulatory filing just out.

The stock is coming surging back today: It's currently up over 14%, after a double digit climb yesterday. Much of Monday's crash has now been reversed, to the extent that Anglo American, another miner, has now performed worse over the week as a whole.

Here's how it looks:

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