(Bloomberg) -- Key rates tied to the US overnight funding market are rising, even after the Federal Reserve adjusted some of its tools in an effort to rein in volatility.Most Read from BloombergHo Chi Minh City Opens First Metro Line After Years of DelayThe Secured Overnight Financing Rate — an important one-day lending benchmark linked to activity in the repurchase agreement market — jumped to 4.40% as of Dec. 24 from 4.31%, according to New York Fed data released Thursday. That leaves it in li