Steepeners and Flatteners

A trader who thinks the Fed is about to cut rates faster than the market expects doesn't have to make a directional bet on rates overall — they can bet specifically that short rates fall more than long rates, without caring whether the general level of rates rises or falls. That's a curve trade: long one maturity, short another, structured so a parallel move in rates roughly cancels out and only the change in the spread between the two maturities drives the P&L.

Building the trade duration-neutral

To isolate the slope view, you weight the two legs so their DV01s offset. Buy the 2-year, sell the 10-year (or vice versa), sized so:

$$DV01_{2y} \times N_{2y} = DV01_{10y} \times N_{10y}$$

In words: pick position sizes so that a 1bp parallel move in both legs produces gains and losses of equal dollar size that cancel — leaving the trade's P&L to be driven almost entirely by the 2s10s spread changing, not by the overall level of rates.

Worked example

A 2s10s steepener: long $20 million (DV01 $1,600/bp total) of 2-year notes, short a DV01-matched amount of 10-year notes ($1,600/bp).

The curve steepens: 2-year yields fall 5bp (bond price up), 10-year yields rise 3bp (bond price down).

• Gain on long 2y leg: $1{,}600 \times 5 = 8{,}000$, i.e. $8,000.
• Gain on short 10y leg: $1{,}600 \times 3 = 4{,}800$, i.e. $4,800 (short position gains when yields rise).
• Total P&L: $8{,}000 + 4{,}800 = 12{,}800$, i.e. $12,800.

Now suppose instead both yields had risen by 4bp in parallel (no steepening or flattening, just a level move). The long leg loses $1{,}600 \times 4 = 6{,}400$ and the short leg gains $1{,}600 \times 4 = 6{,}400$ — they cancel to roughly zero, exactly as the duration-neutral construction intended.

What this means in practice

Curve trades are how macro and rates desks express views on monetary policy path and growth expectations separately from views on the overall rate level — a steepener is a classic expression of "the front end will get cut more than the market has priced," while a flattener often expresses "the central bank is done hiking and long-end growth expectations are fading." These trades are also structural: the curve tends to steepen early in an easing cycle (front end drops fast) and flatten late in a hiking cycle (front end rises fastest as policy tightens), so curve trades are a common way to position for where in the cycle the market is.