Boo! Disagree. JunkDNA gave you a perspective from the Pharmaceutical company side. Here's a perspective from the finance side:
I worked for 2.5 years in a finance firm which specialized primarily in biotech stocks. (We were on the "sell side", meaning our clients were hedge funds and mutual funds, and our product was research reports advising whether to buy or sell the stock of certain biotech companies.)
Without fail, the biggest catalysts for moving the stock price were study results, and the better the results, the bigger the jump. Every company absolutely wants that blockbuster drug that cures a disease.
With CLL, for instance, as in the article, there are a number of treatments, in 1st line and 2nd line after relapse, 3rd line, and so on. And doctors prescribe this one or that one, depending on context and what side effects you can tolerate, etc. If your drug is a complete cure and you can jump straight to first line and everyone prescribes your treatment, then that's a gold mine.
A recent example is Cougar Biotechnology, whose cancer drug abiraterone was so insanely successful the company's stock price rocketed and then was acquired shortly thereafter by Johnson & Johnson.
Lastly, if you finished reading the article, you'd see this part:
"With results for the three patients published Wednesday simultaneously in the New England Journal of Medicine and Science Translational Medicine, money for further studies -- not just in this one type of leukemia, but in other cancers -- will likely pour in from both the government and drug companies."