Definitions and Basics. Definition: Market failure, from Answers.com An economic term that encompasses a situation where, in any given market, the quantity of a product demanded by consumers does not equate to the quantity supplied by suppliers.
MarketWatch News on NUVA. 1  Nasdaq traverses uncharted territory, S&P 500 holds the range top. 2  NuVasive stock price target raised to $74 from $55 at J.P. Morgan. 3  NuVasive upgraded to overweight from neutral at J.P. Morgan.  U.S. benchmarks digest Brexit-fueled whipsaw, S&P 500 tops near major resistance.
Defining NUA. Net unrealized appreciation is the difference between the price you initially paid for a stock (its cost basis) and its current market value. Say you can buy company stock in your plan for $20 per share, and you use $2,000 to purchase 100 shares.Five years later, the shares are worth $35 each, for a total value of $3,500: $2,000 of that figure would be your cost basis, and $1,500 would be net unrealized appreciation.et unrealized appreciation is the difference between the price you initially paid for a stock (its cost basis) and its current market value. Say you can buy company stock in your plan for $20 per share, and you use $2,000 to purchase 100 shares.