* Aussie tumbles as Egypt riots hit risk appetite
* Dollar, Swiss franc, yen seen favoured
* Analysts say Egypt unrest could be repeated elsewhere
By Hideyuki Sano
TOKYO, Jan 31 (Reuters) - The euro dipped and high-yielding currencies tumbled on Monday as investors tried to exit positions associated with high levels of risks on fears that social unrest in Egypt could spread across the Middle East.
As street protests in Cairo showed no sign of abating, investors were increasingly worried that political upheaval could hit other Arab countries, potentially disrupting oil production and heightening diplomatic tensions in the region.
"This will not be limited to Tunisia and Egypt. This could spread to other countries, which could make the whole Middle East unstable," said Mitsuru Saito, chief economist at Tokai Tokyo Securities.
The euro <EUR=> fell as low as $1.3571, having fallen about 0.2 percent from a New York close of $1.3608 on Friday, extending its decline further from a two-month high of $1.3760 marked last week.
It also eased to 1.2794 Swiss francs <EURCHF=>, from 1.2824, and to 111.38 yen <EURJPY=> from 111.74 on Friday.
"Any worsening in fears over stability in the Middle East would further dampen risk appetite, providing support for safe haven currencies like the U.S. dollar, Swiss franc and yen," said Bank of New Zealand currency strategist Mike Jones in Wellington.
The high-yielding and growth-linked Australian dollar fell 0.6 percent to $0.9880 <AUD=D4>, while the New Zealand dollar also dropped 0.6 percent to $0.7692.
"High-yielding currencies and emerging market currencies will come under pressure today," said Koji Fukaya, chief FX strategist at Credit Suisse in Tokyo.
"Investors will try to close positions associated with higher risk. I assume the market was a little bit long on the euro and therefore we are seeing some selling there."
The dollar held steady against the Swiss franc and the Japanese yen.
The greenback changed hands at 82.12 yen <JPY=>, flat from late in New York Friday. The U.S. currency stood unchanged against the franc at 0.9420 franc <CHF=>.
Traders are keeping en eye on headlines from Egypt as thousands defied a curfew, which state television said would be extended by an hour from Monday, demanding that President Hosni Mubarak quit.
"I just think it's a no-win situation. If Mubarak stays in power you're going to have a lot of turbulence and turmoil and demonstrations," said Andrew Brenner, head of emerging markets fixed income, Guggenheim Securities in New York.
"If Mubarak steps down you're going to have a continued move to fundamentalists," he added.
SPREADING UNREST
Some investors fear that what's happening in Egypt could be repeated elsewhere, which could threaten their investments in many emerging markets -- one of the most lucrative strategies last year.
"Behind the unrest is anger against inflation, which is hurting many people in developing countries. The trouble is, that is also happening in countries like India and China, too," said Tokai Tokyo Securities' Saito.
"A flood of money created in the developed world has been flowing to emerging markets. But if those markets turn out to be politically unstable, that money flow will drastically change."
Market players are also aware that selling in some emerging market bonds could escalate to a self-feeding spiral, much like in 2008, when investors had to sell many risky assets to cover losses elsewhere.
"That's what we saw all back on in '08. You had money managers, you had margin calls on certain things and they would sell other things. That's what's going on and I think that's what we're going to see for the next few days. Flight to quality and the dollar should benefit from it." said Guggenheim's Brenner.
Gulf stock markets tumbled on Sunday as investors, rattled by turmoil in Egypt and concerns the unrest may spread, quit their positions to push indices to multi-week lows.
Most Asian shares fell more than one percent on Monday, after Wall Street's benchmark S&P 500 <.SPX> notched its biggest one-day loss in six months on the flight to safety on Friday.
The Egyptian crisis is seen as having the potential to overshadow broader and more fundamental economic events this week, which include a slew of economic data such as U.S. non-farm payrolls and central bank decisions. (Additional reporting by Burton Frierson in New York, Gyles Beckford in Wellington; Editing by Joseph Radford)