State Bank of Travancore board OKs rights issuePress Trust of India / Mumbai May 30, 2011, 14:32 ISTState Bank of Travancore said on Monday its board has approved the draft letter of offer for its planned rights issue.It did not disclose the size of the issue.At 12.48 p.m., shares of the lender were down 0.19% in low volumes at Rs 751.7 in a flat Mumbai market.