Fed officials struggle to convince markets that sub-zero levels are off limits. Please use the sharing tools found via the share button at the top or side of articles. Copying articles to share with others is a breach of FT.com T&Cs and Copyright Policy. Email This email address is being protected from spambots. You need JavaScript enabled to view it. to buy additional rights. Subscribers may share up to 10 or 20 articles per month using the gift article service. More information can be found at https://www.ft.com/tour. https://www.ft.com/content/66ad3c37-3e0f-47f7-aa6c-ba4935c8de51 Rates on so-called fed funds futures contracts — key tools for investors seeking to bet on or hedge against interest-rate shifts — popped above 100 last week. That appeared to be a signal from the market that negative policy rates were on their way.
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