First Trust’s AlphaDEX ETFs are based “on growth factors including three, six and 12-month price appreciation, sales to price and one year sales growth, and, separately, on value factors including book value to price, cash flow to price and return on assets,” according to First Trust.

Eight industry groups are represented in FXL. The ETF allocates over 53% of its combined weight to software and semiconductor stocks. None of FXL’s 77 holdings command more than 2.5% of the ETF’s weight.

Semiconductor ETFs have recently been durable performers as semiconductor stocks are rebounding to steady the broader technology sector, but that does not mean the gains are over for this suddenly hot group. However, valuations are rising for chip stocks.

“While price increases for both DRAM and NAND flash memory are raising the outlook for the overall semiconductor market, it will also put pressure on margins for system vendors of smartphones, PCs and servers,” said Jon Erensen, research director at Gartner. “Component shortages, a rising bill of materials, and the prospect of having to counter by raising average selling prices (ASPs) will create a volatile market in 2017 and 2018,” according to a statement from industry research group Gartner.

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