over a year ago portola was pretty much the poster child for biotech disasters.fter running up most of 2015, the stock tumbled from $50 to high teens in months it's a textbook example of what makes it so dangerous. you should only ever own stocks with this one with money you can afford to lose you hear that? money you can afford to lose this is not a 401(k)-ira situation. it's an example, though, of why taking the kind of risk can be worthwhile what the heck is going on with this one how did the stock go from zero to hero in less than a year. it's a biotechnical that specializes in treating blood clots and other blood diseases the company's lead drug is an anti-coagulant that helps to prevent blood clots from getting worse. it was just approved by the fda a month ago. the market for this drug alone could be worth $3 billion. it's much longer acting than the current standard of care and it's better at preventing venus tlom bow embolisms, blood clots that start in the vein the company itself is conservative it's not just a one-drug wonder, which is why -- i wouldn'

it's more friendly environment makes it easier to buy stocks like portola hand over fist when certainly's going right. a lot has gone right in the past few months they made a deal with health care royalty, in exchange for 50 million up front and more if it gets fda approval. then we got encouraging signs on byvexa, the anti-clotting therapy and a little less than a month ago, the regulators flat out gave the drug their approval bevyxxa is going to roll out sometime this fall and it's huge it's much better than any anti-coagulants on the market. the stock rallied 46% in three

san mateo sheriff deputies were called to portola redwoods state park near la honda... tuesday morning - for reports of a man allegedly exposing himself to children. a child's parent witnessed the incident and called police. officers then arrested timothy smith of watsonville... and booked him into the county jail. the incident remains under investigation. (grant) bart's new police chief says crime on his trains and in his stations is on the rise, as it is in many cities throughout the bay area. riders have noticed it too, at a time, when bart changed the way it releases crime information to the public. kron four's philippe djegal reports the chief knows there's public interest in sharing surveillance video of crimes... but says that info and video has to be released on a case-by-case basis. (philippe) on trains, platforms and at bart stations system wide... just a month and half on the job... new bart police chief carlos rojas is noticing an alarming trend.carlos rojas/bart police dept- "i'm seeing it throughout the state. crime, crime increasing and i don't see us any

we had a crash westbound 580 at portola avenue.eared, but backup remains, and of course, you're heavy before altamont pass. natasha? >> alexis, thank you. meteorologist m >>> we'll start with the 60s this morning in brentwood, livermore and los gatos, 60 to 64 there. rest of us in the mid-to-upper 50s until you get to novato and santa rosa at 52. we have more cloud cover this morning, a little bit of fog out there, so watch out for that during your commute planner. it will be breezy north of the bay bridge again this afternoon. mass transit quite a spread about 30 degrees from san francisco to inland. tomorrow we're going to be about the same as today, and then that big but brief heat wave this weekend. natasha? >> mike, thank you. next on "gma," an infant overheats aboard a delayed flight and the mom is speaking out in an exclusive interview. that's coming up on "gma." we'll have another abc7 news update in about 30 minutes and always on our free abc7 news app. join the whole morning team every weekday 4:30 to 7:00 a.m. the news c