Regulators remain firm on timeline.
Legislators voice cyber-security concerns.
Scarce resources need to be deployed holistically.
Long-pondered audit trail will soon be a reality.
For trading firms, sorting out workflows is high up on the CAT to-do list.
Small-cap exchange says it is wrongly placed in CAT fee plan.
Sell side is penciled in to cover 75% of audit trail costs.
Will 'mission creep' lead to greater dissemination of fixed income trade data?
The plan's operating committee proposes a nine-tier fee structure.