By Philip van Doorn, MarketWatch
Biotech and medical-device companies are leading the charge, with gains up to 265%
The Nasdaq Composite Index, which is about 50 points away from 5,000, hasn't been so high in 15 years, which is a long time to wait for a new record, but the benchmark for tech stocks may be better justified this time around (http://www.marketwatch.com/story/knocking-down-nasdaq-5000-as-us-dollar-sentiment-hits-extremes-2015-02-23).
The dot-com boom and bust are far behind us, yet investors still focus mainly on the large-cap-based S&P 500 Index as a gauge for stocks.
for UPDATE: 10 stocks that are pushing the Nasdaq to 5,000 investment picks