IBM’s stock closes up 9.49%, at its highest level since June 2013, adding ~$20B to its market cap and up nearly 20% year-to-date, on strong AI services demand (Chibuike Oguh/Reuters)

Chibuike Oguh / Reuters:
IBM's stock closes up 9.49%, at its highest level since June 2013, adding ~$20B to its market cap and up nearly 20% year-to-date, on strong AI services demand  —  IBM (IBM.N) shares jumped nearly 13% to a more than 10-year high on Thursday after the company reported a better …