Glossary

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Glossary
Autonomous Market Maker (AMM) 
Each commodity token pair has an associated autonomous market maker that allows market participants to exit a position at any point without having to find a counterparty on the exchange. The autonomous market maker uses a liquidity sensitive algorithm with bounded loss to manage market risk. Autonomous market maker liquidity providers receive pool tokens that entitle them to a fraction of the fees and spread earned by the market maker.
Altcoin 
This term represents a cryptocurrency which is alternative to Bitcoin.
Anti money Laundering (AML)
Anti money laundering (AML) refers to the web of laws, regulations, and procedures aimed at uncovering efforts to disguise illicit funds as legitimate income. Money laundering seeks to conceal crimes ranging from small-time tax evasion and drug trafficking to public corruption and the financing of groups designated as terrorist organizations.
API
API is the acronym for Application Programming Interface and it is a software intermediary that allows two applications to talk to each other.
Banded trading
The Mettalex contract performs the settlement and clearing of the position tokens in the event that the reference price goes outside the specified trading band. The reference price feed comes in from an independent oracle specified at creation of the Mettalex contract and in the event of the price exceeding the cap or floor value, all position tokens are automatically redeemed for the collateral value of their position. The Mettalex contract then resets the floor and cap parameters automatically based on current market condition.
BEP-20
According to Binance Academy:
BEP-20 is a token standard on Binance Smart Chain that extends ERC-20, the most common Ethereum token standard. You can think of it as a blueprint for tokens that defines how they can be spent, who can spend them, and other rules for their usage. Due to its similarity to Binance Chain’s BEP-2 and Ethereum’s ERC-20, it’s compatible with both.BEP-20 was conceived as a technical specification for Binance Smart Chain, with the goal of providing a flexible format for developers to launch a range of different tokens. These could represent anything from shares in a business to dollars stored in a bank vault (i.e. a stablecoin).
Arbitrage
Arbitrage is the simultaneous purchase and sale of the same asset in different markets in order to profit from tiny differences in the asset's listed price.
Bid and Ask Prices
The term bid and ask refers to a two-way price quotation that indicates the best potential price at which a security can be sold and bought at a given point in time. The bid price represents the maximum price that a buyer is willing to pay for a share of stock or other security. The ask price represents the minimum price that a seller is willing to take for that same security. A trade or transaction occurs when a buyer in the market is willing to pay the best offer available, or is willing to sell at the highest bid. The difference between bid and ask prices, or the spread, is a key indicator of the liquidity of the asset. In general, the smaller the spread, the better the liquidity.
Blockchain
The blockchain is a digital ledger of all the transactions ever made in a particular cryptocurrency. It’s composed of individual blocks that are chained to each other through a cryptographic signature. Each time a block’s capacity is reached, a new block is added to the chain. The blockchain is repeatedly copied and saved onto thousands of computers all around the world, and it must always match each copy. As there is no master copy stored in one location, it’s considered decentralized.
Circulating Supply
This term refers to the number of cryptocurrency coins or tokens that are publicly available and circulating in a specific market. The circulating supply of a cryptocurrency can increase or decrease over time.
Collateral
A collateral is something of value given as a guarantee to obtain something else. For instance, a borrower may offer their car as a collateral to a lender when taking out a loan. The vehicle acts as a safeguard or warranty in case the borrower fails to pay their debts.  Usually, collateralized loans present much lower interest rates when compared to non-collateralized ones. Collateral can come in different forms. Some of the most common types include mortgage collaterals, invoice financing and margin trading collaterals.
Collateralization Ratio
To borrow tokens from a DeFi protocol, one must put up more collateral than the loan is worth. Each protocol can use different collateralization ratios. However, users must maintain the designated ratio to prevent liquidation (See Liquidation Ratio).  
Crypto wallet
These wallets store public and private keys allowing users to send, receive, and store tokens. The tokens reside on the blockchain and the wallet accesses them. (See Web 3.0 Wallets).
Decentralized Application (DApp)
A computer program that utilizes a blockchain for data storage, runs autonomously, is not controlled or operated from a single entity, is open source and has its use incentivized by the reward of fees or tokens.
Deflationary token
Tokens are deflationary if a percentage is permanently removed from the marketplace over time. Buybacks and burns are a popular way of destroying tokens. This causes scarcity which hopefully makes the price rise.
ERC-20 
It is the standard to which each Ethereum token complies. This standard defines the way each token behaves so that transactions are predictable. Other cryptocurrencies also use the ERC-20 standard, piggybacking on the Ethereum network in the process.
Fiat
According to the Investopedia's definition:
Fiat money is a government-issued currency that is not backed by a physical commodity, such as gold or silver, but rather by the government that issued it. It usually requires fiat exchanged at a CEX or through local means such as Bitcoin ATMs to be able to purchase cryptocurrency with fiat currency.
Gas fees
Gas fees are rewards paid to  miners to incentivize them to support the network's transactions which become written to the blockchain. On the Ethereum network this gas fee unit amount is expressed in gwei. Operations to or from CEXs, DEXs Liquidity Pools and wallets require gas fees. The cost users incur  due to gas fees will vary depending on the current supply and demand: when demand on Ethereum or an ERC-20 network is at its highest, these gas fees are at also their highest.
Governance tokens (MTLX)
Governance tokens are cryptocurrencies that represent voting power on a blockchain project. On Mettalex DEX, governance tokens (MTLX) are used to vote on system parameters such as choice of autonomous market makers to back with liquidity from the liquidity pool, borrowing rates from the liquidity pool, usage of exchange fees, etc. Governance tokens are minted at an exponentially decreasing rate to incentivise early liquidity providers in the system. Minted tokens are distributed in proportion to the amount of liquidity supplied to the system at each block. Some fraction of the exchange fees and autonomous market maker spreads is used to buy back MTLX and burn.
KYC
Know Your Customer. KYC guidelines fit into the broader scope of Anti-Money Laundering (AML) policies in traditional finance. There is no KYC or AML in DeFi.
Liquidation
Liquidation is applied to borrowers. They can have their collateral liquidated if they do not maintain the set collateralization ratio.
Liquidation Ratio
This is the level at which the collateralization ratio dips that can trigger a liquidation. 
Liquidity pool 
A liquidity pool is a decoupled provider of collateral to the autonomous market maker. Liquidity providers receive an aggregated return from all commodity market maker fees and spreads in exchange for providing collateral that the market makers can use to mint position tokens. In addition liquidity providers receive a pro-rata distribution of MTLX governance tokens based on the amount and duration of their participation in the liquidity pool.
Liquidity Provider
A liquidity provider (i.e. LP) is a user who funds a liquidity pool with own crypto assets so as  to facilitate trading on the platform and earn passive income on the liquidity deposited.
Metamask
​Metamask is a popular Web 3.0 wallet used in DeFi. Other wallets you may hear about are the Binance Wallet and Torus.
Mettalex Smart Contract 
Each position token pair has an associated Mettalex smart contract that acts as a decentralized clearing house. Position tokens are minted in pairs of long and short tokens by locking up collateral in the Mettalex smart contract. Thereby,  position tokens are always fully collateralized, removing margin requirements and counterparty risk. At any stage a token holder can use the Mettalex smart contract to redeem the collateral backing a long and short token pair. The Mettalex smart contract is responsible for settling the position tokens if the underlying commodity index breaches the range (i.e. Price Band) specified at deployment of the Mettalex contract. 
Mining
Mining is the process through which cryptocurrency transactions are gathered, verified and recorded into a digital ledger known as blockchain. The work done by miners is essential for maintaining the integrity of the network and is also responsible for introducing new coins into the system.
NFT
Non-fungible tokens or NFTs are cryptographic assets built on a blockchain with unique identification codes and metadata that distinguish them from each other. These were born as ERC-721 crypto assets representing a unique or rare digital or real world item. They let us tokenize things like art, collectibles, even real estate through a securitisation process that takes place on the blockchain.
Unlike cryptocurrencies which are identical to each other and can be used as a medium for commercial transactions, NFTs represent unique and irreplaceable tokens, thereby making it impossible for one non-fungible token to be equal to another (i.e. NFTs are not fungible). This ensures a highly transparent and flexible record of ownership. An NFT can only have one owner at a time. Ownership is managed through the unique ID and metadata that no other token can replicate. NFTs are minted through smart contracts which assign ownership and manage the transferability of the NFT itself. When someone mints an NFT, they execute a code stored in the smart contracts that conform to different standards (i.e. ERC-721). This information is added to the blockchain where the NFT will be managed.
Oracle
Within the blockchain context, an oracle is a data source used as a bridge between smart contracts and other external sources. More specifically, an oracle is an agent that not only communicates with external data sources but also verifies and authenticates that the data being provided is accurate. Thus, oracles are responsible for providing vital and reliable information to smart contracts, which in turn perform certain tasks.
Over-Collateralization
Over-collateralization means that borrowers must put up more collateral than they borrow. This ensures that lenders don’t lose their funds should a borrower default (See Collateralization Ratio). 
Position tokens
Position tokens track the price change of an underlying asset (i.e. long tokens) or the negative of that change (i.e. short tokens). Leverage is achieved by the token price being a fraction of the asset price. This leverage enables hedgers to manage their risk exposure at minimal cost.
Slippage
The Investopedia's definition says:
Slippage refers to the difference between the expected price of a trade and the price at which the trade is executed. Slippage can occur at any time but is most prevalent during periods of higher volatility when market orders are used. It can also occur when a large order is executed but there isn't enough volume at the chosen price to maintain the current bid/ask spread.
Slippage occurs in all market venues, including equities, bonds, currencies and futures. 
Spread
When an order is made on an exchange or market, the disagreement of the difference in price between potential buy and sell offers of an asset is called the spread. A wide spread in price can lead to higher slippage.
Stablecoin
A stablecoin is a type of cryptocurrency that is designed to maintain a stable market price. Recently, this type of digital currencies has grown in popularity, and we now have numerous stablecoin projects. Although the exact mechanisms vary from one coin to another, stablecoins are supposed to be somewhat resistant to market volatility, so they should not experience significant price changes.
Timing risk
According to Investopedia's definition:
Timing risk is the speculation that an investor enters into when trying to buy or sell an asset based on future price predictions. Timing risk explains the potential for missing out on beneficial movements in price due to an error in timing.
Testnet
A testing network for a new coin, project, product or for potential improvements to an existing product or offering. Testnets (e.g. Kovan Test Network) are used to test the viability and vulnerability of new ideas, concepts, code, and processes prior to moving on to a production network.
Volatility
Volatility describes how quickly and how much the price of an asset changes. It is usually calculated in terms of standard deviations in the annual return of an asset over a set period of time. Because it is a measure of the rapidity and degree of price changes, volatility is often used as an effective measure of the investment risk associated with an asset.
Yield Farming
Yield farming is the practice of staking or lending crypto assets in order to generate high returns or rewards in the form of additional cryptocurrency. Yield farming protocols incentivize liquidity providers to stake or lock up their crypto assets in a smart contract-based liquidity pool. These incentives can be a percentage of transaction fees or a governance token. These returns are expressed as an annual percentage yield (APY). As more investors add funds to the related liquidity pool, the value of the issued returns rise in value. 
Fetch.ai’s Stop-Loss agent for DeFi Liquidity Providers
Mettalex DEX - FAQs
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