What happens when FED talks about rate

[eurusdzn]

Maybe Nasdq 5000 or 5500 becomes a poster for streched valuations.
Someone find the bullish consolidataion of QQQQ Oct,1998 at 126osh,
before rising 98%.
Ok a stretch, but seriously, with more worldwide QE announced recently and, as we speak with China, it is possible this thing could take off and garner some attention.

 

[lesserfool]

Curious, is there any historical reason why the Fed moves in 0.25% increments? Would a move by 0.10 or 0.05 really have a material effect on growth? (beyond the inevitable Wall Street conniption)