Standard Chartered (LSE:STAN) whipsaws near its yearly high: what is behind this week's swings?

Standard Chartered (LSE:STAN) whipsaws near its yearly high: what is behind this week's swings? →

Highlights Standard Chartered climbed to just below its yearly high as banks led London's blue-chip advance. The shares reversed the following session, giving back part of the gain. An ongoing buyback launched in late summer and interim pro…