South Africa's rand slightly firmer ahead of S&P review

JOHANNESBURG (Reuters) - South Africa's rand firmed slightly in early trade on Friday, with investors cautious ahead of S&P Global Ratings review on the country's debt and a U.S. jobs report that could set the market's tone in a few days. * At 0645 GMT, the rand traded at 14.0675 per dollar, 0.23percent firmer from its New York close on Thursday. * "Investors are buying the rand in anticipation of a holdin rating and once it is out the way, we will see a possiblemove weaker as profits are lo