SeaNews Market Index

Chain-linked & Transaction-weighted: The index uses a chain-linking methodology to reduce biases from base-year drift. It reflects where the market is trading each week (transaction-weighted) rather than a fixed basket.

2023 Rebase: All series are rebased to a fixed 2023 average (2023 = 100), providing a clear historical benchmark.

Price Normalization: Raw prices are normalized using Hedonistic Age Adjustments (Tanker: 8y, Bulk: 10y, Gas: 7y reference ages) and filtered via Winsorized Mean (10-90th percentile) to eliminate outliers.

Data Integrity: Weeks with no trades use a Carry-forward mechanism. Periods with low sample counts are flagged for transparency.