Central Bank Monetary Policy: Inflation Targeting and Forward Guidance

Modern central banks operate on an inflation-targeting framework with a 2% goal (Fed, ECB, BoE, BoJ excepted until recently). Policy rates are the lever; forward guidance is the amplifier. Trading around central banks means trading the expected rate path, not the current rate.

The 2% target and the reaction function

• Central banks raise rates when inflation runs above 2% sustainably, cut when below or when growth falters.
• The Fed's "balanced approach" weights both inflation and employment; the ECB weights inflation more heavily; the BoJ spent years fighting deflation and tolerates above-target inflation.
• The reaction function is what traders actually model: how many basis points of rate change per 0.1% inflation surprise, per 0.1% unemployment surprise. Markets price this continuously.

Forward guidance

Forward guidance is the central bank telling the market where rates are headed, to reduce uncertainty and move long-end yields without acting.

• Calendar-based: "rates will stay low until [date]." Strong, credible, hard to deviate from.
• State-based: "rates will stay low until inflation reaches 2% sustainably." More flexible; the Fed's current style.
• The market trades the gap between priced expectations and the guidance. If the Fed signals "higher for longer" but the market prices cuts in six months, that gap closes — usually by the market repricing, not the Fed changing tone.

How to trade it

• Rate decision day: the statement and press conference move markets more than the rate itself (which is usually pre-priced). Watch the dot plot (Fed), the wording changes versus prior statement, and the press conference tone.
• Currency impact: hawkish surprise strengthens the currency; dovish surprise weakens it. A 25bp surprise hawkish move in the Fed typically produces a 0.5–1.5% USD move on majors within the session.
• Bond impact: front-end yields (2-year) are most sensitive to rate path expectations; the 10-year responds to growth and term premium. Hawkish guidance steepens or flattens depending on whether the market believes the path is credible.
• Equity impact: rate hikes compress valuations (higher discount rate hits growth stocks hardest); cuts expand them. The first cut of a cycle is historically bullish; the last hike is bullish when it signals the cycle is ending.

The key discipline

Never trade a central bank release without knowing what the market has priced. Use fed funds futures, OIS, or broker-provided probability tools. A 25bp hike that was 100% priced is a non-event; a 25bp hike priced at 60% is volatility. The trade is the surprise relative to expectations, never the action itself.