 Zurich-based Credit Suisse AG CS, 3.85 CSGN, 2.71 could seek at least 2 billion in a potential capital increase, and has lined up big banks just in case, according to a Tuesday report by Bloomberg, l: which cited sources. Those banks include Morgan Stanley MS, 3.12 and Royal Bank of Canada RY, 1.08 RY, 1.25 , with the Qatar Investment Authority and Abu Dhabis Mubadala Investment Co. having also been gauged for any interest. 