* Banks surge; CBA gains 1.8%, NAB rises 1.7% * Discretionary stocks notch best week since April 2020 * S&P/NZX 50 index closes up 1.5% (Updates to close) By Nichiket Sunil June 12 (Reuters) – (The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)

