If you want to know who says what at next week's meeting of the Federal Reserve’s Federal Open Market Committee (FOMC), which oversees market operations for the central bank, you will have to wait until the year 2016 to find out.

While the FOMC releases the minutes of these meetings three weeks after the fact, full transcripts are kept secret for five years. Right now the most recent transcript available is for December 13, 2005. And even these transcripts have been edited from the original.

As a result, the public still does not know the details of what ...