[kasey_junk]

Periodic auctions still need tie breakers. CBOE for instance falls back to size then time. This is the same tie breaker that some CME futures contracts have used in a continuous order book. Those contracts always had more gamesmanship than standard price/time contracts when I was trading.

Has that become true in the auction space at well?

[hcarlens]

When they were first introduced, each of the fba books had slightly different mechanics (matching priority, timing, price determination), so each book needs a slightly different approach. I guess you could see it as gamesmanship, but in equity markets dealing with market mechanics properly is just part of the job.