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280<br />

. That is for a given absolute value <strong>of</strong> forecast error, the bond sell-<strong>of</strong>f is more<br />

violent than a bond rally. And it holds for all the economic environments (i.e.<br />

and vs. and ) except <strong>in</strong> an economic expansion ( vs. ) where it<br />

seems that negative forecast errors (i.e. a weaker confidence than expected)<br />

generate larger bond moves than a positive error (see Fig. 4). This is an<br />

illustration that when CC comes ‘aga<strong>in</strong>st the trend’, it tends to get more publicity<br />

<strong>in</strong> the bond market. Also, when the economy is contract<strong>in</strong>g, positive forecast<br />

errors tend to impact on the market more than negative ones.<br />

5.2 General results<br />

5.2.1 Tables A2 to A5<br />

All the signs, except <strong>in</strong> some pathological cases, are <strong>in</strong>tuitively correct. ISM and<br />

Non-farm payrolls <strong>high</strong>er than expected yield bond market sell-<strong>of</strong>fs. And UNEM<br />

and UNEMW <strong>high</strong>er than expected yields bond market rallies. Additionally,<br />

asymmetries and results are robust across divisions <strong>of</strong> the economic cycle.<br />

NFP, UNEM and UNEMW<br />

represent the labour market. But NFP is the<br />

variable that has the stronger effect. NPF has tendency to exacerbate the peaks<br />

and bottoms <strong>of</strong> the bus<strong>in</strong>ess cycle (see , , , ). By contrast, UNEM<br />

has a lower and different effect. It has a tendency to accelerate the bond trend<br />

(see , ). Yet, as they are both released at the same time we would expect<br />

similar effects on TY. The reasons for this different reaction are: 1) UNEM is not<br />

seasonally adjusted by the US Census Bureau whilst the Bureau <strong>of</strong> Labour<br />

Statistics adjusts NFP. We could adjust UNEM by seasonality but it is not what the<br />

market observes. 2) The NFP survey has a larger sample size (390,000 establishments)<br />

than UNEM (60,000 households) and 3) <strong>in</strong> 1994 the questionnaire and<br />

the collection method for UNEM changed, <strong>in</strong>troduc<strong>in</strong>g some disturbances on the<br />

sample. Regard<strong>in</strong>g UNEMW, it is the only weekly released fundamental. It is not<br />

based on a survey but on a complete register announced every week. It has therefore<br />

a short term ongo<strong>in</strong>g view <strong>of</strong> the labour market and can provide the first<br />

signals <strong>of</strong> some future change <strong>in</strong> the economy, i.e. it is a sort <strong>of</strong> lead<strong>in</strong>g <strong>in</strong>dicator<br />

<strong>of</strong> the state <strong>of</strong> the economy. But, although it can be very useful for discover<br />

ongo<strong>in</strong>g hidden problems, it is very erratic.<br />

5.2.2 Tables A6–A11<br />

D. Veredas<br />

These fundamentals have a smaller effect on the bond future than the previous<br />

ones. Nevertheless, s<strong>in</strong>gs (not reported here) are <strong>in</strong>tuitively correct and results are<br />

robust to all economic environments. This is especially true for PPI, CPI, RS and<br />

IP. By contrast, the effects <strong>of</strong> HS and DG are very limited. They last no longer than<br />

half an hour with some rebound <strong>in</strong> some cases after one hour and a half. PPI and<br />

CPI deserve a special comment. These two fundamentals are <strong>in</strong>flation measures<br />

but PPI has a weak impact <strong>in</strong> TY, contrary to CPI. PPI is not significant because<br />

ISM, released slightly earlier, is <strong>in</strong>formative enough about the manufactur<strong>in</strong>g sector.<br />

Traders still keep <strong>in</strong> m<strong>in</strong>d the ISM results as a benchmark <strong>of</strong> the manufactur<strong>in</strong>g

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