It was a year of mergers and consolidation. Not. Or, almost.

It was a year of refashioning of regulatory rules, around the world. Not. Or, almost.

Outages and technical snafus abounded. Definitely. 

And the march toward instantaneous receipt of market data, analysis of market conditions, risk checks and turnaround of new orders reached the 10-microsecond mark.

Here are the Top 10 Stories of 2011, measured in large part by your viewership.

The rundown starts here.

Tom Steinert-Threlkeld writes for Securities Technology Monitor.