Dow component Dupont (DD) is up 37 cents to $32.87 and options are seeing some action ahead of earnings, due tomorrow before the bell. 9660 calls and 6020 puts traded so far. The top trade is a block of 3500 Feb 34 calls, bought at 45 cents per contract and tied to 133K shares at $32.80. Implied volatility is up about 1 percent, to 29, as investors brace for possible volatility around tomorrow’s earnings release.