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€STR: Definition & Meaning | Bondfish

What it means

The ECB calculates €STR from actual, reported transactions — not from bank estimates — and publishes it at 08:00 CET on every TARGET2 business day. Because it is based on real overnight unsecured borrowing by banks, it is treated as the euro’s risk-free reference rate. €STR replaced the older EONIA benchmark, which was discontinued in January 2022.

The rate moves closely with the ECB’s policy stance. In mid-July 2026, for example, €STR was trading at roughly 2.2%, having risen alongside the ECB’s policy rates over the preceding period.

Why it matters for bond investors

€STR is the anchor for a large share of euro-denominated floating-rate products. The coupon on many euro floating-rate notes (FRNs), the reset rate on bank AT1 and other perpetual bonds, and the pricing of euro interest-rate swaps are all referenced to compounded €STR plus a spread. If you hold a euro floating-rate bond, €STR is usually the base rate driving your coupon — when it rises, your coupon rises, and vice versa. You can compare euro floating- and fixed-rate bonds side by side with the Bondfish bond screener.

Example

FRN coupon = compounded €STR + fixed spread
e.g. 2.20% (€STR) + 0.50% spread = 2.70%

Related terms

This definition is for general information only and is not investment advice. Bond investing involves risk, including possible loss of principal.