The Fed policy meeting Wednesday that was designed to further clarify its new stance on "average inflation targeting" — a topic addressed by multiple policymakers on its rate-setting committee in the month since it was announced — left the market with more questions than answers.

What's happening: The Fed announced that not only was it keeping U.S. interest rates at essentially zero for now but it plans to keep them there until at least 2023, extending its forecast an additional year.