Yes, to Constantinople it was just an update of the Ethereum network on the way of its transition from PoW to PoS. And no new coins were created as a result of this hard fork. Regarding the price of Ethereum, many said that this should have a positive impact on the price of Ethereum now, before the main update of Serenity, which is scheduled to launch at the end of 2019 or early 2020. Perhaps in order to see a positive price movement, more time is needed.