Answer: prohibited private securities transaction
Explanation: The action performed by the registered securities agent by soliciting a customer to buy mutual funds and not recording the trade in the books after the customer buys under the Uniform Securities Act is a prohibited private securities transaction. This is essentially because private securities transactions are a prohibited business practice under the Act as a result, every trade effected by an agent must be recorded on the books of the broker-dealer and which in turn must be supervised by the broker-dealer.