Wall Street is facing a gloomy reality

It couldn't have started out much better for Wall Street in 2017. 
First-quarter revenues boomed, ginning up hopes that a moribund 2016 was the end of a steady, four-year decline for banking.
The scorecard: $42 billion in first-quarter revenues at the top-12 banks, including $21.4 billion from fixed income trading — a 14% and 20% increase, respectively, according to data from industry consultant Coalition. 
But high hopes have since been reined back in.
At an