
Investors cheered a combination of analyst upgrades and corporate deal-making. Tech stocks advanced after Barclays Capital upgraded Intel. Shares of the semiconductor giant rose 2.4%. Many market players take the entire week off, which means the trading volume is low, and relatively small moves could cause major volatility. At the same time, with the major indexes on track to post double-digit percentage gains for the year, many money managers have closed their books.QQQQ implied volatility plunged to record lows.