* Nikkei down 10%
* Australia, S. Korea, Taiwan down 7%
* U.S. futures negative
* Dow posts worst plunge since 1987
* Asian stock markets: https://tmsnrt.rs/2zpUAr4
By Tom Westbrook
SINGAPORE, March 13 (Reuters) - Asia's stock markets crashed on Friday as panic gripping world financial markets deepened, and even haven assets such as gold and bonds were ditched to cover losses in the wipeout.
Japan's Nikkei was in freefall, dropping 10% and heading for its worst week since the 2008 financial crisis. Not one stock on the index is in positive territory.
MSCI's broadest index of Asia-Pacific shares outside Japan fell 2% and is down 12.8% this week.
Australia's benchmark fell 7.6% and is set for its worst week on record, while in South Korea the won was shredded and the Kosdaq fell 8%, triggering a short trading halt.
Hong Kong's Hang Seng index fell 6.8%, its steepest drop since 2008. China's Shanghai composite fell 4%.
Currency markets steadied somewhat after furious dollar buying overnight, as fears of systemic risks drive demand for the world's reserve currency.
Even after its worst crash since Black Monday in 1987 overnight, Dow futures are down about 0.8% in Asia and S&P 500 futures are off 0.4%.
"There is a sense of fear and panic," said James Tao, an analyst at stockbroker Commsec in Sydney, where phones at the high-value client desk rang non-stop.
"It's one of those situations where there is so much uncertainty that no-one quite knows how to respond...if it's fight or flight, many people are choosing flight at the moment."
The plunge, as the coronavirus pandemic spreads, gathered pace after U.S. President Donald Trump spooked investors with a move to restrict travel from Europe, and after the European Central Bank disappointed markets by holding back on rate cuts.
Trade was halted on the S&P 500 after it hit downdraft circuit breakers. It fell further when trade resumed, eventually losing 9.5% to close 27% below February's peak.
Gold, usually a safe harbour in times of panic, fell 3.5%, yields on long-dated U.S. Treasuries shot up - where they mostly held on Friday.
"Wherever anyone has any risk, people just want to bring risk back to flat at the moment, that's what happening," said Stuart Oakley, Nomura's global head of flow FX in Singapore
"This is what happens when you get what's known as a value-at-risk shock, where people have drawn down so much P&L that they just need to draw down all risk."
The VIX volatility index - Wall Street's "fear gauge" - and an equivalent measure of volatility for the Euro Stoxx 50 hit their highest since the 2008 financial crisis.