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June 24 (Reuters) - Indonesia's stocks edged higher on Wednesday after index provider MSCI deferred its review of the country's emerging market status to November, while the rupiah extended losses, nearing the key 18,000 level.

South Korea's benchmark KOSPI index .KS11 jumped more than 4% in the first 30 minutes of trading after a 10% plunge in the previous session, with the earlier decline largely attributed to profit-taking following a sharp rally in chipmaker stocks.

The rebound in South Korean equities lifted the MSCI Emerging Markets Asia gauge .MIMS00000PUS slightly, though it remained near six-session lows. An index tracking ASEAN stocks .MISU00000PUS, dominated by Singapore's banks, was little changed.

In Indonesia, the Jakarta Composite Index .JKSE added 0.5% after a two-day slide, with investors taking some comfort from MSCI's decision to defer its review.

The index provider said reforms introduced so far in Indonesia were a "step in the right direction", but warned it could consider options including a consultation on a downgrade to frontier market status if sufficient progress is not made by November.

The rupiah IDR= weakened to 17,955 per U.S. dollar, within a striking distance of the key 18,000-mark and its lifetime low of 18,190 a piece. Yield on Indonesia's 10-year sovereign bonds ID10YT=RR edged higher to 7.263%, while that on a one-year bond ID1YT=RR jumped to 7.975%.

Elsewhere in Southeast Asia, stocks in Singapore .STI and Malaysia .KLSE rose around 0.5% each, with those in the city-state notching a record high. The Thai baht THB=TH continued its decline, slipping to a 13-month low of 33.425 a dollar.

HIGHLIGHTS:

** Samsung Electronics 005930.KS jump 10%, SK Hynix 000660.KS rise as much as 5.8%

** Singapore Airlines launches $221 million dim sum bond at 2.38% yield

** MSCI keeps South Korea at emerging market status, cites FX accessibility

Asia stock indexes and currencies at 0231 GMT
COUNTRY	FX RIC	FX DAILY %	FX YTD %	INDEX	STOCKS DAILY %	STOCKS YTD %
Japan	JPY=	+0.01	-3.03	.N225	0.32	34.19
China	CNY=CFXS	+0.04	+2.89	.SSEC	-0.25	3.21
India	INR=IN	+0.00	-5.14	.NSEI	0.00	-8.82
Indonesia	IDR=	-0.61	-7.11	.JKSE	0.50	-29.08
Malaysia	MYR=	-0.10	-2.08	.KLSE	0.53	0.52
Philippines	PHP=	-0.60	-4.29	.PSI	-0.34	0.86
S.Korea	KRW=KFTC	-0.14	-6.23	.KS11	2.86	100.25
Singapore	SGD=	-0.05	-0.86	.STI	0.47	12.57
Taiwan	TWD=TP	-0.16	-0.75	.TWII	-1.67	59.90
Thailand	THB=TH	-0.52	-5.80	.SETI	-	-