The 'green rush' is on for marijuana companies

Medical Marijuana Traded on Stock Market. These are heady times for supporters of legalized marijuana as well as those looking to cash in on pot's growing national acceptance. This month, voters in Washington state and Colorado agreed to legalize the recreational use of marijuana for adults. And medical marijuana is currently legal in 18 states and Washington D.C. 

"Think of it as another dot.com explosion," said Bruce Perlowin, CEO of Hemp Inc. (HEMP), in a recent press release.

And according to an investor fact sheet for Medical Marijuana Inc. (MJNA), the current U.S. medical marijuana industry is estimated at $17 billion, with expectations it could grow up to about $29 billion by 2016.