EghtesadOnline: U.S. stocks dropped on Friday, giving the S&P 500 its worst day since June as investor nervousness increased following a nuclear test by North Korea and Federal Reserve officials' comments lifted rate hike bets.

EghtesadOnline: U.S. stocks rose modestly on Tuesday, as gains in the tech sector helped buoy the Nasdaq to a record intraday high and solid housing market data provided more evidence the economy may be picking up momentum.