. >> reporter: health care anovalan in the nasdaq composite. investor appetite for new tech stocks helped push tin dex within 5% of all time ether net bubble high. at the risk of sounding trite, the new tech boom is different. >> in 2000 you had a power ball move in the nasdaq that s following the tail end of this 15 year secular bull market and now it's been a much steadier healthy move into 5,000 on what we see as the early stages of a new secular bull market. >> reporter: amo biggest differences? bioteches now the biggest driver of gains up 35% in 2014 as companies like gilead have brought big drugs to markets. another big difference? tech valuations. microsoft the biggest weight in the nasdaq 15 years ago traded at 70 times earnings. today, apple the biggest driver is valued at 14 times its forward earnings after posting the highest quarterly profits of all time. >> i see this as a change in that consumers are spending more on tech versus enterprise. microsoft was mainly selling to businesses. now apple is obviously a very consumer-focused