Skilled Healthcare Group (SKH), Cambrex Corporation (CBM) and Insight Enterprises (NSIT).

FORBES: Small-Caps Getting Destroyed

Further, although thousands of CBM wells are fractured annually, EPA did not find confirmed evidence that drinking water wells have been contaminated by hydraulic fracturing fluid injection into CBM wells.

FORBES: EPA's Fracking Hysteria

CBM, a consultancy, the main potential for online bond-trading is in fixed-income securities that are already fairly liquid: these (notably government bonds and blue-chip corporate bonds) are likely to become more liquid, and more keenly priced.

ECONOMIST: E-bonds, licensed to kill

In its review of incidents of drinking water well contamination believed to be associated with hydraulic fracturing, EPA found no confirmed cases that are linked to fracturing fluid injection into CBM wells or subsequent underground movement of fracturing fluids.

FORBES: EPA's Fracking Hysteria