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Virus Marketing, an older term now largely supplanted by viral marketing, describes a marketing strategy that relies on the rapid dissemination of information or product promotion through existing social networks. This approach leverages word-of-mouth and network effects to achieve widespread exposure quickly, mimicking the organic spread of a virus.

VoIP economics analyzes the financial implications of Voice over Internet Protocol technology, comparing costs and benefits against traditional telephony and assessing its impact on business profitability and efficiency.

Volatility swaps are derivative financial instruments that allow market participants to trade in future volatility. Unlike options, which derive their value from implied volatility but are not a direct bet on its level, volatility swaps permit direct speculation or hedging on the future realized volatility of an underlying asset.

The Variola Matrix, also known as a risk matrix or probability-impact matrix, is a risk assessment tool used to identify, analyze, and prioritize potential risks. It visually represents risks by plotting their likelihood (probability) against their potential impact (severity) on a grid.

The volatility smile is a pattern observed in options markets where implied volatility is not constant across all strike prices for a given expiration date, typically showing lower implied volatility for at-the-money options and higher implied volatility for in-the-money and out-of-the-money options.

VAT input is the Value Added Tax that a business pays on the purchase of goods and services used in its economic activity, which can be deducted from the VAT collected on its sales.