let's look at some individual movers and bring into emily graffeo with more. good earnings beat. the stock was up as much as 8%. the biggest jump since november after the company attracted record inflows into its retail brokerage business, adding 1.2 million new brokerage accounts in the fourth quarter, beating estimates. revenue also beat estimates, coming in 20% growth year over year, five .3 billion. over all results showing positive trends of you where, according to an analyst at jefferies. a different story for shares of walgreens. that stock tumbling today after the u.s. department of justice claimed walgreens distributed controlled substances like opioids in pharmacies across the u.s. while ignoring red flags that the prescription were probably illegal. walgreens had denied the allegations and actually sued the usda over requirements on pharmacists. finally, looking at shares of netflix. the stock is reporting after the bell. although this is a streaming company, it's becoming increasingly more to analyst that they need to focus on live events and sport

bloomberg's emily graffeo. so that brings us to the question. what exactly is deepseek?hy is it moving markets so much today? why does it seem to be panicking investors? let's bring in rachel metz in san francisco who covers a.i. for bloomberg news. deepseek feels like it came out of nowhere. how long has there been something that has been percolating and worth paying attention to? >> this particular company and this particular model, i think for a lot of people did seem to come out of nowhere. the company habit existed for all that long. and some of the tactics that they're using, the way they built this model, it sound like what some of the biggest companies are doing to build their models right now. a lot of techniques are what people in the industry are familiar. it's just the speed with which they built it and the low costs and the limited access they would have to the best chips on the market would make the performance that really astounding. these models have been so expensive to build. if somebody can build them quickly with less money and fewer of the high power