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What Is Nexus Mutual?

Nexus Mutual (ticker NXM) is a decentralized, member-owned alternative to insurance built on Ethereum. Members pool capital together and use it to provide "cover" against crypto-specific risks such as smart contract exploits, custodial exchange failures, proof-of-stake slashing penalties, and stablecoin depegs. Because it is structured as a discretionary mutual rather than a regulated insurance company, claim payouts are decided by the membership itself, with every cover purchase, stake, and claim recorded onchain. Since launching in 2019, the mutual has protected billions of dollars in assets and paid out millions of dollars in claims across incidents like the FTX collapse and various DeFi protocol exploits.

Nexus Mutual was founded by Hugh Karp, a former CFO of Munich Re's UK life business who spent more than 15 years in the traditional insurance industry. Karp's idea was to revive the original mutual model of insurance, people pooling risk directly with each other, using Ethereum smart contracts to replace the corporate middleman. The protocol launched on Ethereum mainnet in May 2019, initially offering only smart contract cover, and has since expanded into a broad risk marketplace.

A defining feature of Nexus Mutual is membership. To buy cover, stake, or hold NXM, you must join the mutual by passing a KYC identity check, agreeing to the member agreement, and paying a small one-time fee of 0.002 ETH. This is the most important thing to understand about the NXM token: it can only be transferred between verified members, and it does not trade on any exchange. To give the wider market access, the community created Wrapped NXM (wNXM), a standard ERC-20 token that trades freely on exchanges. Anyone can hold wNXM, but only members can unwrap it back into NXM to actually use the protocol.

NXM is the mutual's governance and utility token, and its value is backed by the crypto assets held in the mutual's capital pool. For years, NXM was priced by a bonding curve tied to the mutual's capital relative to its minimum capital requirement, with the protocol minting and burning tokens as members entered and exited. In November 2023, members voted (proposal NMPIP-209) to replace the bonding curve with a Ratcheting Automated Market Maker (RAMM), a pair of virtual one-sided pools that let members buy NXM from, or sell NXM back to, the mutual at prices that protect the capital pool. NXM has no fixed maximum supply; it expands and contracts as capital flows in and out.

The protocol's v2 architecture, launched in March 2023, reorganized Nexus Mutual into open risk infrastructure. Members with underwriting expertise can create staking pools, choose which cover products to underwrite, and set pricing, while other members delegate their NXM to those pools to earn a share of cover fees. Staked NXM carries real risk: when a valid claim is paid, stakers in the pools backing that cover have tokens burned to fund the payout. NXM holders also govern the protocol and historically assessed claims by voting, a process that is moving toward a permissioned, expert-led claims model under the v3 changes approved in 2025.

Nexus Mutual has weathered notable adversity, including an attack on its own founder. In December 2020, Hugh Karp's personal computer was compromised and his MetaMask extension was replaced with a malicious version, which tricked him into signing a transaction that sent 370,000 NXM (around $8 million at the time) to the attacker, who had passed KYC to become a member. The protocol itself was not exploited and no member funds were affected, but the incident remains a widely cited lesson in verifying transaction details on a hardware wallet screen before signing.

Getting Started With Nexus Mutual

Because NXM is a members-only token, getting started looks different from most cryptocurrencies:

  1. Step 1: Set up an Ethereum wallet such as MetaMask, ideally paired with a hardware wallet, since your membership is tied to your wallet address.
  2. Step 2: Join the mutual through the official app by completing KYC verification and paying the one-time 0.002 ETH membership fee.
  3. Step 3: Acquire NXM as a member by swapping ETH through the protocol's RAMM in the app, or by buying wNXM on an exchange and unwrapping it.
  4. Step 4: Use your membership: buy cover for protocols or custodians you are exposed to, stake NXM in staking pools to earn cover fees, and vote on governance proposals.

How to Get a Nexus Mutual Wallet?

NXM and wNXM are both Ethereum tokens, so any solid Ethereum wallet works. Keep in mind that NXM can only sit in a wallet address registered as a Nexus Mutual member, while wNXM is a normal ERC-20 token anyone can hold.

MetaMask

MetaMask is the most common way to interact with the Nexus Mutual app. You connect it to complete membership signup, buy cover, swap ETH for NXM, and manage staking. The same wallet can hold wNXM.

Hardware Wallets

A Ledger or Trezor paired with MetaMask keeps your keys offline. Given that the 2020 attack on the founder worked by feeding a tampered MetaMask interface to a hardware wallet user, always verify the recipient address and transaction details on the device screen itself before approving anything.

Any ERC-20 Wallet for wNXM

If you only want exposure to wNXM without joining the mutual, any wallet that supports ERC-20 tokens, such as Rabby, Trust Wallet, or a hardware wallet, can store it like any other Ethereum token.

Nexus Mutual Resources

How to Buy Nexus Mutual?

There are two distinct paths, and it is important not to confuse them. Native NXM is not listed on any exchange and cannot be sent to non-members; wNXM is the freely tradable version.

Joining the Mutual (NXM)

The direct way to get NXM is to become a member at the official app, complete KYC, pay the 0.002 ETH membership fee, and then swap ETH for NXM through the protocol's RAMM. Members can also unwrap wNXM into NXM at a 1:1 rate inside the app. Note that residents of certain restricted jurisdictions cannot join.

Centralized Exchanges (wNXM)

wNXM is listed on a handful of centralized exchanges such as MEXC and CoinEx, typically traded against USDT. Note that Binance delisted wNXM in June 2024, so liquidity is thinner than it once was. Holding wNXM gives you price exposure, but you cannot buy cover, stake, or vote until you join the mutual and unwrap it.

Decentralized Exchanges (wNXM)

wNXM also trades on Ethereum DEXes such as Uniswap, where it can be swapped against ETH and stablecoins without an account, like any other ERC-20 token.

Latest Nexus Mutual News

Nexus Mutual's current chapter is the transition to v3, a set of member-approved changes that move claims assessment from open token voting to a permissioned panel of vetted experts, redirect value captured by the RAMM to NXM stakers, and build bridges between the mutual's capital and regulated insurance markets. In 2025 the mutual generated over $5.7 million in cover fees, paid claims tied to the Arcadia Finance exploit and the Stream Finance collapse, and launched new products including Bug Bounty Cover, which helps protocols fund large bounty payouts in partnership with Immunefi, Cantina, and Sherlock.

The product range keeps widening beyond DeFi protocol cover, with Bitcoin-denominated cover and slashing protection for Babylon's Bitcoin staking ecosystem in development. Because cover offerings, capital pool size, and tokenomics parameters change over time, the official documentation and the mutual's Dune dashboards are the best sources for current figures.