Higher yields make it more expensive for governments to borrow, potentially complicating Poland’s financing plans. The Finance Ministry has already canceled one bond auction, suggesting it is trying to avoid locking in higher borrowing costs. Analysts say the rise has been driven by turmoil in the Middle East, which has pushed oil prices above $100 a barrel and fueled expectations of higher inflation and interest rates. Economists say Warsaw still has enough liquidity to delay fresh issuance for a time, but not indefinitely. The trend is not unique to Poland, with yields rising across Central Europe and also affecting Germany.