<p>SoftBank Group Corp said on Friday it spent 61 billion yen ($570 million) buying back its shares in May, as part of a record 2.5 trillion yen repurchase programme to support its share price in volatile markets.</p>.<p>That takes SoftBank's total spending on buybacks since announcing the programme in March to 311 billion yen, backed by a massive asset sale programme as CEO Masayoshi Son, buffeted by underperformance at his technology investments, takes steps to stabilise the group.</p>.<p>The buyback programme has caused jitters at credit rating agencies, with S&P Global Ratings saying on Thursday it puts SoftBank's financial rigour in question.</p>
<p>SoftBank Group Corp said on Friday it spent 61 billion yen ($570 million) buying back its shares in May, as part of a record 2.5 trillion yen repurchase programme to support its share price in volatile markets.</p>.<p>That takes SoftBank's total spending on buybacks since announcing the programme in March to 311 billion yen, backed by a massive asset sale programme as CEO Masayoshi Son, buffeted by underperformance at his technology investments, takes steps to stabilise the group.</p>.<p>The buyback programme has caused jitters at credit rating agencies, with S&P Global Ratings saying on Thursday it puts SoftBank's financial rigour in question.</p>