US Treasury yields rose slightly during trading on Wednesday, as investors awaited the Federal Reserve's interest rate decision, along with a press conference by its chairman, Kevin Warsh, which is seen as the most important event for determining the contours of US monetary policy in the coming period.

The yield on the 10-year Treasury note rose by more than one basis point to 4.614%, while the yield on the two-year note, which is more closely linked to interest rate expectations, climbed to 4.291%. Meanwhile, the yield on the 30-year Treasury note remained near 5.10%, as markets awaited the Federal Reserve's policy decisions.

Market expectations suggest that the Fed will keep interest rates unchanged within the range of 3.50% to 3.75%, but investors are more focused on the wording of the monetary policy statement, comments, and workshops, which may provide clearer indications of the timing of any potential move at upcoming meetings.

Bond market movements reflect continued caution, especially with inflation remaining relatively above target levels, along with the robustness of the US labor market, which is prompting traders to reassess the likelihood of monetary tightening continuing for a longer period.

Market pricing, according to the FedWatch tool, shows the probability of an interest rate hike at the upcoming September meeting rising to around 76%, reflecting investors' increasing bets on the continuation of a tight monetary policy if inflation data does not show a tangible slowdown in the coming months.

US bond yields are closely watched by investors because of their role in determining borrowing costs and pricing various asset classes. A rise in yields typically puts more pressure on stocks, especially technology stocks and highly valued companies, while supporting the dollar and attracting investments towards fixed-income instruments.