john kosar of asbury research is watching open interest, effectively a count of how many traders hold positions, instead of trading out of them. >> if open interest starts to dry up here, it indicates that copper prices are probably peaking. if they do, they tend to lead the dow transports lower and, of course, as the dow transports go, so goes the rest of the market. >> tom: the dow jones transportation index has been rallying as well, hitting its most recent high on monday after the bullish profit outlook from fedex, but since then, the index has stalled. and that's tonight's "market focus." >> susie: many states are experiencing something like the california gold rush, but it's not gold prospectors are after, it's natural gas. an abundance of shale gas beneath much of the u.s., and new drilling technology, have sparked a frenzy among energy companies. for many states, take michigan as an example, drilling can mean big money and big headaches. diane eastabrook shows us how one michigan county is coping. >> reporter: northern michigan is a peaceful place with rolling farmland and qua