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Trading basics

Ark Invest

ARK Investment Management LLC (commonly referred to as "ARK" or "ARK Invest") is an American investment management firm based in St. Petersburg, Florida, that manages several actively managed exchange-traded funds (ETFs), and the ARK Venture Fund, a closed-end interval fund that invests in both public and private companies. It was founded by Cathie Wood in 2014. ARK funds were four of th

Trading basics

Cascading failure

A cascading failure is a failure in a system of interconnected parts in which the failure of one or few parts leads to the failure of other parts, growing progressively as a result of positive feedback. This can occur when a single part fails, increasing the probability that other portions of the system fail. Such a failure may happen in many types of systems, including power transmissio

Trading basics

Negative pricing

In economics, negative pricing can occur when demand for a product drops or supply increases to an extent that owners or suppliers are prepared to pay others to accept it, in effect setting the price to a negative number. This can happen because it costs money to transport, store, and dispose of a product even when there is little demand to buy it, or because halting production would be

Trading basics

Net metering

Net metering (or net energy metering, NEM) is an electricity billing mechanism that allows consumers who generate some or all of their own electricity to use that electricity at any time, instead of when it is generated. This is particularly important with renewable energy sources like wind and solar, which are non-dispatchable (when not coupled to storage). Monthly net metering allows c