This morning, as I noted in an earlier post, Citigroup downgraded shares of Nvidia (NVDA), at least in part in anticipation that expectations for 2011 tablet unit sales are at risk of over-estimating demand.

FORBES: The Coming Tablet Glut

One would expect that in purchasing or leasing land for resource extraction estimating the value of that land would introduce some risk.

FORBES: Connect

The model also enables managers to fine-tune debt portfolios by estimating the effect new assets will have on the overall risk profile.

FORBES: Default-risk bookies