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ArcaExArchipelago Exchange (technologically advanced equity trading system)
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Exchange (which is owned by an ECN, ArcaEx) for not enforcing their own
The Archipelago Exchange (ArcaEx) recently announced that it will list shares of advanced transportation and energy products company Zero Air Pollution (ZAP), under the symbol ZAPZ.
Thus, a quote posted on the ArcaEx electronic trading system would be protected against a trade-through, but a manual quote on the floor of the NYSE would not be protected.
In the United States, the Nasdaq, the CME, and ArcaEx (the entity combining the Archipelago ECN and the Pacific Stock Exchange) currently have traded shares, and the Philadelphia Stock Exchange has announced plans to convert to public ownership.