tori carter is known for smooth interactions with artist and now he is chosen to lee spotify. an interview next. this is bloomberg. ♪ selina: cannabis stocks are heating up. the marijuana indexes gained over 50% since mid-august. there's a growing market in the u.s.. bloomberg tv has an inside look at the technology driving the role at a retail sales. be common anchor market for the multibillion-dollar industry on the east coast. the next state in the u.s. to sell recreational marijuana is gearing up slowly. pot sales are legal in massachusetts as of july 1 but bylaw i can't be sold until tested at a licensed lab. the certified products are free from old and dangerous pesticides. >> the biggest obstacle has been lab's not being licensed. before anything can be sold it has to be tested. selina: now you can. this lab is one of two that won the state approval. brian stress nick runs the lab. nick runs the lab. >> we have 13 or 14 clients. clients send their products to see the x for testing. >> we have about 60 samples a day. crazy oncehat to go recreational comes on board. i ima