There are 3 periods:
Immediate now: You can consider Singapura Finance. If you deduct away the underlying 5cn dividend, you pay less than $1.50 per share.
Right after 9th Sept (last day of rights trading): OCBC should be cheaper. And those who got rights, die die must exercise the rights = there is no reason to support mother share price = good time to cover the rights that you offloaded on Monday ($2.26+$7.25) = much much cheaper than $9.91
Long-term: I don't know if you should banking counters for long-term because i fear Black October in 2014. If you desire to do so, please switch to UOB because the purchase of Wing Hang is just a national-service, not a very wise commercial decision. Wing Hang is a burden to OCBC due to the acquisition premium write-offs and future doubtful debts for HK/China companies.
“I don’t get it,” “They must have a different calculator to me.” - ANZ CEO.
http://blogs.wsj.com/moneybeat/2014/01/13/anzs-smith-cant-figure-hong-kong-banks/