WSJ: Pfizer considering buying Global Blood Therapeutics for roughly $5 billion

Shares of Global Blood Therapeutics Inc.
GBT,
+38.88%
jumped 9.5% in trading on Friday after The Wall Street Journal reported that Pfizer Inc.
PFE,
-0.94%
is considering buying the company for about $5 billion. There were media reports earlier this week that Global Blood Therapeutics, which markets a sickle-cell treatment, is attracting takeover interest. The company’s stock is up 79.6% this year, while the broader S&P 500
SPX,
-0.64%
is down 12.8%.