Semiconductor stocks may be on the brink of a major turnaround after lagging the stock market the past year. The largest ETF tracking chipmakers topped the stock market leaders list Thursday and confirmed a fresh new uptrend as it broke out of a bullish chart pattern. Market Vectors Semiconductor ETF (SMH) vaulted 4.01% to 33.73 in healthy trade. The 0.79% gain in SPDR S&P 500 (SPY) and 0.60% lift in PowerShares QQQ (QQQ), tracking the 100 largest