CAIRO, Oct 11 (Reuters) - Egyptian payments firm e-finance for Digital and Financial Investments has raised its institutional share offering to 23.5% of the company's total eventual capital after strong demand, one of the managers of the offering said on Monday.The state-controlled firm is offering shares to institutional investors in a sale that closes at 15:00 GMT on Monday. A smaller one-week offering to retail investors began on Sunday.Reporting by Patrick Werr Editing by Aidan Lewis Disclaimer: The views expressed in this article are those of the author and may not reflect those of Kitco Metals Inc. The author has made every effort to ensure accuracy of information provided; however, neither Kitco Metals Inc. nor the author can guarantee such accuracy. This article is strictly for informational purposes only. It is not a solicitation to make any exchange in commodities, securities or other financial instruments. Kitco Metals Inc. and the author of this article do not accept culpability for losses and/ or damages arising from the use of this publication.