Agents not obligated to keep secrets when they don't get the listing

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Can a real estate agent sell information she or he obtains during a listing presentation if the homeowner chooses to list with somebody else?

If the seller has divulged confidential information about an upcoming divorce, personal financial crisis, or problems with the house, that information could be of value to a buyer or the buyer’s agent. Does the agent who failed to land the listing owe any duties to the seller?