MOSCOW/MILAN/LONDON, October 10 (Fitch) Fitch Ratings has affirmed Kazakhstan's Joint Stock Company Sovereign Wealth Fund Samruk-Kazyna's (SK) Long-term foreign currency Issuer Default Rating (IDR) at 'BBB+', Long-term local currency IDR at 'A-', National Long-term rating at 'AAA(kaz)' and Short-term foreign currency IDR at 'F2'.