NEW YORK (TheStreet) -- The S&P 500 ended the week on a sour note, closing lower on Friday by 0.81%.
On CNBC's "Fast Money" TV show, Guy Adami, managing director of stockmonster.com, said he was surprised by Facebook's (FB) selloff following its strong earnings report on Wednesday. He added the bulls need the S&P 500 to hold 1,834.
Pete Najarian, co-founder of optionmonster.com and trademonster.com, was a buyer of Facebook because of its strong business model and steep decline in the stock price.
Josh Brown, CEO and co-founder of Ritholtz Wealth Management, attributed the selloff in momentum stocks to portfolio managers lowering their risk and margin issues for investors.
Steve Grasso, director of institutional sales at Stuart Frankel, agreed that margin issues are likely playing a larger role in the momentum stock selloff than most investors think. He said the S&P 500 needs to hold 1,856.
Brown suggested that a market rally would be difficult to sustain if three important sectors continue to underperform: financials, technology and health care.
Adami continued to argue that Treasury bond yields are going lower. So far he has been correct, with the iShares 20+ Year Treasury Bond ETF (TLT) rising to $112 on Friday. He has maintained a $115 price target for quite some time.
Najarian said he is waiting to see Twitter's (TWTR) earnings results and hopes the company demonstrates some upside momentum in its business metrics.
Brown said he is still long a small position in TWTR from near the initial public offering date. He reminded investors there is a large share lockup expiration shortly after earnings. He hypothesized that the earnings report may have good news because management will want the stock to be more valuable when their positions become eligible for sale.
Spencer Rascoff, CEO of Zillow (Z), said 38% of American homeowners are in a negative equity position with their mortgages. He added that there is a lot of demand for housing with very limited supply. Because of this, home prices are quite high, giving prospective home buyers "sticker shock" when looking for a new home. He concluded that Zillow.com receives 75 million unique visits per month.