(Bloomberg) — You might have heard about the New York Stock Exchange's trading halt Wednesday. If you were an investor, that's probably all that happened — you heard about it.

In a fragmented market where no venue controls more than 16 percent of volume, the halt was almost impossible to detect for anyone but professional traders and brokers, according to Yousef Abbasi of JonesTrading Institutional Services LLC. Anyone who wanted to buy or sell stocks could, just not at NYSE.

"Today proves that we have a resilient infrastructure," said Abbasi, the global market strategist at JonesTrading in New York. "If something goes down, something else picks it up. Trading goes on."

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