This is actually a pretty big deal. The 10yr treasury spiking like that could signal the waking up of the
Bond Market Vigilantes.
Here's the 10yr treasury over the last week
[web]http://ichart.finance.yahoo.com/w?s=%5ETNX[/web]
It did have a pretty wild spike, but its coming back down. If it continues to fall into the FOMC meeting, than, its inflation and the party is still on (and I'm buying a McMansion)
If it keeps rising into the FOMC than Ben will have a hard time dropping rates and will mean deflation (not to mention a stock crash if BendOver doesn't drop at least the 0.5%).
However the Fed rate is more than 1% higher

than short term treasuries and it looks like the yield curve is inverting (
link) so I can't imagine him not giving the 0.5% expected.