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For Facebook to live up to its larger-than-life public image, it will have to withstand a broader stock market where the overwhelming pressure is heading downward.

罢丑别听Facebook听bet then 鈥� at least for investors willing to take a stab at the company whose听goes online Friday 鈥� is that the shares can rise even if the market falls, and perhaps even create its own momentum that lifts all of Wall Street.

Overnight trading indicated that stocks could open positive tomorrow, but听听are volatile and could change on any murmur out of Europe.

听"The trading on Facebook is going to be isolated. It's going to be exclusive between the people who use Facebook and feel it's going to be the second coming, and the people who've been waiting to get some liquidity out of it so they can sell it," says Keith Springer, president of Springer Financial Advisory in Sacramento, Calif. "It's basically an ecosystem unto itself."

听An ability to bifurcate itself from the broader market pressures would be crucial at a time when stocks face an array of headwinds coming both from Greece and at home.

听罢丑别听听yield 鈥� a benchmark both for borrowing rates and economic growth 鈥� is trading near record lows.

听Overseas, Greece is edging ever-closer to a messy divorce from the European Union, while听听were downgraded late Thursday, raising worries that the debt problem is ready to go from a nuisance to a full-blown global crisis.

"The real question is, should Facebook even be going public with everything that's happening right now?" said Todd Schoenberger, managing director at BlackBay Group. "They're going to do well (Friday). It's going to pop, but if things were better, Facebook would do two or three times that much or better."

While Schoenberger thinks Facebook can turn in a positive performance without an accompanying gain in the major indexes, he doesn't expect the stock to be much help to the broader selling trend.

"You're not going to have a halo effect like you would with an听," he said. "You're not going to see听听trade higher just because of Facebook."

罢丑别听听price at the open will briefly be $38, which is at the high end of the expected range the company indicated to the Securities Exchange Commission.

The price from there will be subject to a variety of factors, not least that market correlation, or the tendency of stocks and other asset classes to move in the same direction, has returned after plunging in the first quarter.

"If any stock can buck the overall downtrend, it could be Facebook," said Ryan Detrick, senior analyst at Schaeffer's Investment Research in Cincinnati. "But that's a dangerous game to be in because everything has been so correlated."

Still, it will be hard for a market, even one that's under as much pressure as this, to resist the momentum that a $100 billion company will provide on its first day.

"My gut would be we get some little bounce and then selling comes in, because now people have had their heads handed to them and they're realizing little old Greece could trigger a lot of stuff," said Kathy Boyle, president of Chapin Hill Advisors in New York. "If QE3 (the third leg of the Federal Reserve's听quantitative easing)听isn't happening, there's no saving this market."