calculation

According to the official announcement, Binance has released an important update regarding the price index calculation model for commodity-type TradFi perpetual contracts. Starting from May 9, 2026, at 05:00 (UTC+8), Binance will adopt the order book EWMA price index calculation model to replace the fixed model for calculating the price index of commodity-type TradFi perpetual contracts during daily maintenance, holidays, and weekends.The order book EWMA price index calculation model will be applied to all commodity-type TradFi perpetual contracts, including XAUUSDT, XAGUSDT, XPTUSDT, XPDUSDT, COPPERUSDT, CLUSDT, BZUSDT, NATGASUSDT, and future commodity-type TradFi perpetual contracts that will be listed on Binance.Equity-type TradFi perpetual contracts will continue to use the fixed model during daily maintenance, holidays, and weekends until further notice. If Binance adopts the order book EWMA price index calculation model, a separate announcement will be made.

According to market news, South Korean courts plan to adopt new guidelines that will exclude debts incurred from stock or cryptocurrency investments from liquidation calculations, thereby reducing the total amount debtors need to repay creditors in personal restructuring procedures.The new regulations will be implemented this month in the courts of Daejeon, Daegu, and Gwangju. This is the latest measure by the South Korean government to address the debt issue. By 2025, the country's household debt-to-GDP ratio has risen to 92%, and the government has committed to controlling the growth rate of household debt at 3.8%. The Suwon and Busan courts have begun classifying some cryptocurrency and stock market investment losses as "general property" losses rather than "speculative debts." Seoul Bankruptcy Court Judge Lee Seok-jun called in 2024 for the government to establish more regulations to protect cryptocurrency investors. The Daegu Restructuring Court stated that it would penalize any debtors who "deliberately conceal" cryptocurrency purchases and "disguise them as failed investments."

The luxury real estate brand Sotheby's International Realty, under the auction giant Sotheby's, has released a report sharing the current evolution of the global luxury real estate market and the economic policies and factors that have the greatest impact on it. The report points out that the influence of cryptocurrency on luxury home consumption is increasing, especially in markets such as Dubai, New York, and California. Adjustments in regulatory policies may allow crypto assets to be included in mortgage qualification.

The six major state-owned banks, including Industrial and Commercial Bank of China, Agricultural Bank of China, Bank of China, China Construction Bank, Bank of Communications, and Postal Savings Bank of China, have successively announced that starting from 2026, they will pay interest on the balance of digital RMB real-name wallets opened by customers at the aforementioned banks according to the listed interest rate for demand deposits, with the interest calculation rules consistent with those for demand deposits. However, Bank of Communications stated that if the digital RMB wallet opened by the customer is a type four personal wallet, the balance in the wallet will not accrue interest.

According to the Shanghai Securities Journal, Industrial and Commercial Bank of China, Agricultural Bank of China, China Construction Bank, Bank of China, Postal Savings Bank of China, and Bank of Communications have successively announced that starting from January 1, 2026, the balance of the real-name digital RMB wallets opened at these banks will earn interest at the same rate as the bank's demand deposit rate, with interest calculation rules consistent with those of demand deposits.

OKX will update the calculation method of the loan-to-value ratio (LTV) on December 22, 2025, at 18:00, and will launch the health factor coefficient. The new calculation method will be based on the adjusted collateral value, aiming to provide users with clearer information. The health factor is used to help users track borrowing risks, and when the health factor falls to 1 or below, the collateral may be liquidated.

The security agency BlockSec's on-chain tracking platform BlockSec Phalcon posted on platform X, stating, "Balancer and several of its fork projects were attacked a few hours ago, resulting in losses exceeding $120 million across multiple chains. This was an extremely complex attack.Preliminary analysis indicates that the root cause was the attacker's manipulation of the invariant calculation for BPT prices, distorting the BPT price calculation and allowing the attacker to profit from a single batch transaction from a specific stablecoin pool.Taking the attack transaction on Arbitrum as an example, the batch swap operation can be broken down into three stages: 1. The attacker exchanges BPT for the underlying asset to precisely adjust the balance of one token (cbETH) to bring it close to the rounding boundary (amount = 9). This creates conditions for precision loss in the next step; 2. The attacker then uses a pre-constructed amount (= 8) to swap between another underlying token (wstETH) and cbETH. Due to rounding down when scaling the token amount, the calculated Δx slightly decreases (8 0.918 to 8), resulting in an underestimated Δy, which causes the invariant (D) in Curve's StableSwap model to also decrease. Since BPT price = D / total supply, the BPT price is artificially suppressed; 3. The attacker then reverses the exchange of the underlying assets back to BPT, restoring balance while profiting from the drop in BPT price.

ChainCatcher message, on-chain analyst Zack posted on X that a certain source of funds traced back to the Linea team's address (0xDeFcEDd246ba4eDD2D5584e566d8d6E88d98f7a6) has deployed the "Linea Allocation Multiplier" contract on the Linea mainnet, which may be used for airdrop multiplier calculations.Zach further stated that considering the main criteria for the Linea airdrop will be points (LXP) and on-chain multipliers, and now that both are ready, it may indicate that Linea will soon open airdrop queries.

ChainCatcher news, according to market news, Hyperliquid implemented a new mark price calculation method for pre-market perpetual contracts early this morning. This change caused the funding rates for WLFI and XPL to surge, with WLFI's annualized funding rate increasing from 11% to 100%, and XPL's annualized funding rate rising from 11% to 800%.As of the time of writing, the current price of XPL on Hyperliquid is $0.66, representing a 22.6% premium over Binance's $0.538. The current price of WLFI on Hyperliquid is $0.292, showing a 13.6% premium over Binance's $0.257.

According to ChainCatcher, a report by Fortune states that scholars from the American Enterprise Institute (AEI) have found significant calculation errors in the tariff policy recently announced by the Trump administration. The White House incorrectly used the retail price elasticity (0.25) in the formula instead of the import price elasticity (0.945), resulting in an overestimation of the tariff rates by about four times.If the correct values were used, Cambodia's 49% tariff rate would drop to 13%, Vietnam's 46% would decrease to 12.2%, and most countries would even fall to the White House's set minimum tax rate of 10%.This error has triggered significant market volatility, with noticeable declines in the stock markets of the U.S., Asia, and Europe. AEI economists have accused this as a result of the White House deliberately manipulating the figures to achieve Trump's desired high tariffs.The White House, on the other hand, argues that using retail prices is reasonable and states that the actual tariff rates should be higher.

ChainCatcher news, Sony's L2 network Soneium has announced that it has fixed a critical op-node bug affecting the L1 blob base fee calculation. All Soneium Minato node operators must upgrade their node settings by March 20 to remain compatible with the network. This upgrade will not immediately affect Soneium developers or end users.

ChainCatcher news, Binance co-founder Zhao Changpeng previously retweeted a media report on the X platform stating that the UAE holds $40 billion worth of Bitcoin. Subsequently, some members of the community questioned this data, suggesting that the related report seemed like an AI-generated article. In response, Zhao Changpeng said, "I also want to know how they arrived at this exact number. The data collection is quite difficult and higher than I expected, but then again, there are many wealthy people there (in the UAE)."

ChainCatcher news, according to the official announcement, Binance will adjust the calculation method of the settlement price for futures contracts on November 11, 2024, at 16:00 (UTC+8). The settlement price for futures contracts will be calculated using the average of the price index every second for the last 30 minutes before delivery (from 15:30 to 16:00 UTC+8), totaling 1,800 price indices.Current contract settlement price calculation: The settlement price for futures contracts is currently calculated based on the average of the price index every second for the last hour before delivery (from 15:00 to 16:00 UTC+8), totaling 3,600 price indices.New contract settlement price calculation: The new settlement price for futures contracts will be calculated based on the average of the price index every second for the last 30 minutes before delivery (from 15:30 to 16:00 UTC+8), totaling 1,800 price indices.

ChainCatcher message, UniSat posted on social media that a minor issue affecting the balance calculation on the Fractal testnet was discovered, resulting in a few eligible addresses being excluded. The team is actively working to resolve this issue and will soon update the status of the eligibility check, as well as provide further updates as they become available.

ChainCatcher message, Lista DAO announced that slisBNB assets will support Binance Launchpool, and rewards calculation will be available. Holding slisBNB assets in a Web3 MPC wallet will qualify you.

ChainCatcher message, Jupiter co-founder meow released a supplementary statement regarding some issues faced by the Jupiter platform last week. He expressed sincere gratitude to users and community members, apologized for technical and communication errors, and committed to continuous improvement of the platform experience.Details of the supplementary statement:Priority fee calculation error: There was an error in estimating the priority fee when calculating the gas required for front-end execution. Although this is not common under normal circumstances, it became a major issue during severe congestion. The team takes full responsibility for this.DCA downtime issue: Due to an estimation error by CU, the platform's DCA function was down for about 6 hours, resulting in user orders not being executed. The team expressed deep apologies for this and will review operations to improve vigilance.Low liquidity tokens: To ensure the safe execution of DCA, the platform conducts price and slippage checks before trading. However, the marked price of low liquidity tokens may differ significantly from the execution price, preventing the engine from executing trades. The team will improve the user interface, add more information, and optimize safety check methods.Future plans: The team plans to add more information to the user interface and gradually implement intelligent safety checks to address existing issues.

ChainCatcher message, Aevo posted on X that it is modifying the calculation method for the funding rate of perpetual futures contracts, with the change taking effect on August 1, 2024, at 16:00.

ChainCatcher message, Blast announced on social media that the airdrop event will start in a week.If a user's EOA holds Gold or points, they must log into the Blast dashboard at least once using that EOA (by receiving an invitation or linking it to an existing account) for it to be included in the airdrop calculation.In addition, DApps must distribute all Gold or points to users before June 25 at 20:00 Beijing time.

ChainCatcher news, Trusta's Chief Technology Officer Simon posted on social media that the multiplier rule in the airdrop allocation design of ZKsync and LayerZero will exacerbate airdrop polarization and has potential actionable space.Simon stated that while he fully understands the project's emphasis on certain types of transactions, assets, and wallets, the use of multiplication or addition rules in airdrop design is still worth discussing.