construction materials firm martin marietta launched a hostile bid to buy rival vulcan materials. the offer from martin is for $5 billion in stock. at tonight's closing prices, that would give vulcan shareholders $36.69 per share as of friday's closing price. martin said it launched the hostile offer because talks with vulcan weren't progressing. with vulcan in play, shares shot up 15%, closing well above the implied buyout offer from martin. vulcan says it will advise shareholders within 10 days. martin marietta, meantime, also saw a bounce, up more than 1.5%. the intel profit warning darren reported in earlier hurt the tech sector, particularly the chip stocks. as we mentioned, intel's warning is the third from the industry in the past week. the exchange-traded fund focused on semiconductor stocks dropped more than 3%. the technical trend for this fund over the past year has been