Banks are proceeding with care in the business of selling proprietary data to buy-siders, bolstering personnel while making a soft entry into the world of dealing their own data. 

“In our conversations with banks, they tend to get trigger-shy because they don’t want to be perceived as revealing confidential information. There are so many internal frictions,” says Tammer Kamel, founder and chief of Quandl, a platform for alternative data.

Another question is to whom banks can sell and whether