* Biggest fall on Indonesia's stock market in five years
* Rand tumbles to more than two-year low, bonds hit hard
* All eyes on Argentina after latest peso drubbing
* Turkish lira sags again but not the worst of the moves
By Marc Jones
LONDON, Sept 5 (Reuters) - Emerging markets storms raged fiercely on Wednesday, with South Africa's rand at the centre of fresh currency tumult and losses since January for the world's biggest EM stock index nearing $1 trillion again.
It was another torrid session in both Asia and fragile EMEA markets. Indonesia's stock market had suffered its worst day in over five years as its currency pains worsened while Chinese equities fell almost 2 percent in Shanghai.
The rand then slumped to a more than 2-year low in a fresh 1.5 percent drop as traders also dumped its bonds and the most globally traded EM currency, the Mexican peso, too.
The latest peg for the spreading angst had been another 3 percent overnight drop for Argentina's peso after news that it was trying to engineer a rapid injection of support from the International Monetary Fund.
Trade war and general economic health worries were raw too, with investors wary of the threat of fresh U.S. tariffs on another $200 billion worth of Chinese goods that could take effect after a public comment period ends on Thursday.
"Given the magnitude of the move in Argentina, I think the focus is still on that and on possible contagion," said North Asset Management EM portfolio manager Peter Kisler.
There was no evidence of wide-spread contagion yet he added, though what global stock markets do next could be crucial.
The day's falls across markets left MSCI's 24-country EM stocks index down for a sixth straight day and down almost 20 percent from late January, a move that has wiped over $950 billion off its combined worth at the time.
The biggest individual move saw Indonesian stocks slump almost 5 percent at one point in the biggest fall since 2013 as the rupiah currency wobbled around its lowest levels since the Asian financial crisis in 1998.
The central bank said it had "decisively intervened" in FX and bond markets in morning trade.
"EM equities have really been underperforming developed markets. This will end sooner or later, but my feeling is that development markets will catch up to EM rather than that EM will bounce significantly."
Financial flow numbers released by the Institute of International Finance on Tuesday had also underlined the nerves among EM investors.
Foreign money inflows to emerging markets shrank to just $2.2 billion in August from almost $14 billion in July, they showed, with net outflows from emerging debt of almost $5 billion during the month.
South Africa had said Tuesday its economy returned to recession in the second-quarter of this year with the second straight quarter of contraction, even before the worst of the emerging currency shock hit over the summer.
Elsewhere in Asia, India’s rupee had skidded further overnight to new record lows and Malaysia’s ringitt fell to its lowest in 9 months.
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Reporting by Marc Jones; graphic by Karin Strohecker