# Glossary

**Market**

Term | |
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| Perpetual futures are futures contracts with no expiration date. The “perpetual” status is maintained by paying/receiving the funding fee. |

| Everlasting options are the equivalent of perpetual futures for options which gives traders long-term options exposure without the effort, risk, or expense of rolling positions. |

| A power perpetual is a perpetual derivative indexed to a power of the price of some underlying instrument.
First of all, we specifically implemented the case of $p=2$, i.e. the perpetuals of BTC^2 and ETH^2. Since the square of BTC price is a huge number, we downscale it to a smaller unit - milli (prefix for 1/1000). Namely, the object being traded on Deri is |

| Base tokens are the tokens accepted by Deri Protocol as contributed liquidity by the liquidity providers or as collateral by the traders. |

| This is the fund fee converted to a time unit of one day. The funding that one long contract pays one short contract is always accrued on a second basis, so daily funding really means the following: Daily funding = funding rate per second * 864000, where 864000 is the number of seconds per day. Please note that a positive funding fee means that longs are paying shorts, while a negative funding fee means that shorts are paying longs. |

| The ratio of option price change to the underlying price change. Mathematically, Delta is the first-order differential of the option price as a function of the underlying price. |

| For perpetual futures, Funding period is the time period for which the funding fee (MARK-INDEX) is paid. For everlasting options, Funding period is the time period for which the funding fee (MARK-PAYOFF) is paid. For example, if for everlasting options Funding Period = 7 days, then every second a long (short) contract pays (receives) a funding fee = (MARK-PAYOFF)/7 |

| The ratio of option Delta change to the underlying price change. Mathematically, Gamma is the second-order differential of the option price as a function of the underlying price. |

| Spot price of the underlying asset. The Index Prices on Deri Protocol are provided by Oracle. |

| Price of the market, given by Deri Proactive Market Making (DPMM). This is the trading price of a trade with an infinitely small trading volume (i.e. without slippage) at the current moment. |

| The volume of any trade (in terms of notional) must be an integer multiple of Min Trade Unit. |

| Among all the base tokens, Base0 is used as the accounting unit and to settle the PnL. Essentially, this token plays the role of “cash” in the trading business. |

| The theoretical price of everlasting options calculated by the model. This is used as the starting point of the DPMM (in place of the Index Price for the futures DPMM). |

| Total long positions minus total short positions for the current trading symbol. If positive (negative), traders’ total positions on the long side are more (less) than the short side, which means the pool is passively taking a short (long) position. |

| The average price paid when trade is executed |

**User Account**

Term | Description |
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| The part of funds in your margin account that is |

| Dynamic Effective Balance = Total discounted margin + Unrealized Pnl+ Accrued Funding Fee Total discounted margin =∑ base token balance * Please note that the Unrealized PnL is calculated by the mark price, which might be different from the realized pnl when the position is actually closed (due to the slippage). |

| The percentage of the notional value that you must cover with collateral when opening a new position. |

| The percentage of the notional value that you must cover with collateral to keep your open positions from being liquidated. |

| The part of funds in your margin account that is |

| Mining Pnl is a liquidity provider’s PnL in terms of the base token that is caused by the trading activities on the involved liquidity pool. Specifically, Mining Pnl = 20% of Transaction Fee + Funding Fee + Shared remaining margin in liquidated Positions + Traders’ loss (-Traders’ profit) Please note that the following three parts of income are NOT included in the Mining PnL: 1. the DERI token reward 2. the interests accrued from the money market protocol (e.g. Venus) 3. the token reward by the money market protocol (e.g. XVS) Refer to Mining for more details. |

**Position**

Term | Description |
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| The part of the funding fee that is accrued (i.e. recorded) but not settled yet. It will be settled at the next settlement action (usually taking place with your next trading action). If positive, the pool owes you; otherwise you owe the pool. |

| The average price for establishing the current position. If the position is established with multiple trades, then this equals the total cost of all the trades divided by the position volume. |

| The estimated liquidation price. If the index price of the contract reaches below the liquidation price (when long) or above (when short), the trader’s account will be liquidated. |

| The profit or loss that would be realized if the position were closed at the moment. |

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