For stocks, it's just what the doctor ordered.
Health care companies are leading the market's rebound from a sharp sell-off two weeks ago, helping push the Dow Jones industrial average and Standard & Poor's 500 index back to record levels.
The industry, which is made up of a range of companies, from global drugmakers like Pfizer to insurers like UnitedHealth, has risen 11.2 percent since October 15, when the stock market's recent slump hit bottom. That is a bigger rise than the 8.4 percent gain for the broader market.
The sector's surge has been driven by its strong third-quarter earnings.
About two-thirds of companies in the S&P 500 have now turned in results, and the health care industry is on track to have the best earnings growth, according to data from Estimize, a company that gathers forecasts from a range of financial professionals.
Average earnings growth for the sector is forecast to come in at 14 percent for the period, higher than growth of 11.7 percent for all companies in the index. Sales are also booming, with sector revenue expected to rise 12 percent for the quarter, above the 4.5 percent growth overall.
Celgene has been one of the best-performing health care stocks in the S&P 500 since the market slump ended Oct. 15. Shares of the biotechnology company have surged 24 percent since the bottom, helped by a strong earnings report last month that showed double-digit sales growth. The company is also confident about its drugs in development.
Health care stocks, which also include medical device makers and hospital owners, have been an investor favorite for some time. The sector is up 21 percent in 2014, and is on track to outperform the broader market for the fourth straight year.
What's driving the streak? Aging populations in the developed world mean more money is being spent on medicines and treatments.
Health care spending is forecast to grow at an average of 5.7 percent in the 10 years from 2013 to 2023, 1.1 percentage points faster than the overall growth rate for the economy, according to estimates from the Centers for Medicare and Medicaid Services. The U.S. now spends close to 20 percent of its gross domestic product on health care, compared with 14 percent twenty years ago, according to World Bank figures.
Within the sector, some big drug companies are attractive to investors because they pay a large dividend relative to the average S&P 500 company.
AbbVie, for example, has a healthy yield of 3.1 percent compared with 2 percent for the broader market. The yield shows how much a company pays out in dividends each year relative to the price of its stock.
The company is also benefiting from a strong business. The stock surged Friday after it reported third-quarter earnings that were better than analysts forecast. The maker of Crohn's disease treatment Humira also raised its earnings outlook for the second time this year.
The company has seen its stock price jump 16 percent since the end of the slump.