The stock gained 2 naira, or 0.9 percent, its largest intraday increase since Aug. 1, to 215 naira at 12:39 p.m. in Lagos.
Renaissance set a price estimate of 303 naira for the stock, it said in an e-mailed research note today.
Guinness shares have risen 13 percent this year, compared with an 8.8 percent decline in the Nigerian Stock Exchange All- Share Index over the same period.
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