Luminex (LMNX, news, chart, volatility) is seeing a jump in put volume ahead of its earnings release. Volume in this thinly traded name is running 99 times the usual today, with 2,570 puts and 10 calls traded. Shares of the Austin, TX medical instruments company are down 12 cents to $18.91 and the November 17.5 puts are the most actives. 2,560 have traded (97 percent on the offer), compared to open interest of 100 contracts. It appears to be put buying and perhaps some hedging activity ahead of the profit report due out November 6 after the close.