Coinbase Institutional has announced the addition of six new assets to its Coinbase 50 Index (COIN50) for the fourth quarter. The newly included digital assets are Hedera (HBAR), Mantle (MANTLE), VeChain (VET), Flare (FLR), Sei (SEI), and Immutable (IMX). The COIN50 index serves as a benchmark, tracking the performance of the top 50 eligible digital assets listed on the Coinbase exchange.