Rosenberg argues the nominal yield curve would be inverted right now if it were not for the fact that short term rates are essentially at zero. The Treasury shows the Friday July, 9 nominal yield curve as:
|Date||1 mo||3 mo||6 mo||1 yr||2 yr||3 yr||5 yr||7 yr||10 yr||20 yr||30 yr|
If we assume that expected inflation for the short term is (say) -3, that is, that deflation is expected over the short term, but that inflation is expected to rear its ugly head over the long term (say) + 3, then we can use Fisher's relation that nominal rates less expected inflation equals real rates, to see that the REAL yield curve could be inverted right now:
2 year Short term nominal (.63) - expected deflation (-3.00) = 3.63 real
30 year Long term nominal (4.04) - inflation (+3.00) = 1.04 real
If the real yield curve is inverted, it's an ominous sign...