LAGOS (Reuters) - Shares in Nigeria's Stanbic IBTC Bank, a unit of South Africa's Standard Bank, fell 4.9 percent on Thursday, after the lender posted a 16.89 percent drop in pre-tax profit to 11.24 billion naira for 2011 full year.

Gross earnings grew 18.83 percent to 67.43 billion naira during the period, it said, in a report through the Nigerian Stock Exchange. Its shares fell to 6.8 naira.