MEV — Maximal Extractable Value Explained
MEV (Maximal Extractable Value) is the profit a validator — or someone paying a validator — can make by reordering, including, or excluding transactions in a block. If your transaction is sitting in the queue and a sophisticated actor sees it before it confirms, they can act around it for profit.
That sounds abstract. The concrete forms are familiar:
- Sandwich attack — buy in front of your swap, sell after it.
- Frontrunning — copy your trade and execute it before yours.
- Backrunning — let your trade land, then trade right after to capture the resulting price gap.
- CEX/DEX arbitrage — captures the price gap between an on-chain DEX and a centralized exchange. (See Solana CEX/DEX Arbitrage.)
The actors who hunt these opportunities are MEV searchers — bots scanning the mempool (or pre-block state) for trades they can act around.
Where MEV happens
| Chain | Mempool visibility | Block time | MEV character |
|---|---|---|---|
| Ethereum | Public mempool — anyone can see pending tx | ~12 s | Sandwich-heavy, well-tooled, multi-billion $ market |
| Solana | Pre-block "leader visibility" via Shreds, no traditional mempool | ~400 ms | More backrunning + arbitrage, less classic sandwich |
| Other L2s | Varies — many are encrypted or sequencer-controlled | varies | Lower MEV than mainnet, growing as TVL grows |
Solana doesn't have a public mempool the way Ethereum does. Instead, transactions stream to the current leader as Shreds. That changes the MEV landscape — sandwiching is harder, but backrunning and arb still work.
Who profits, who loses
| Role | Role |
|---|---|
| Searcher | Finds the opportunity, builds the transaction, pays a tip to the validator. |
| Validator / Block producer | Includes the searcher's bundle in exchange for a tip (and sometimes a kickback). |
| Bundle relay (Jito on Solana, Flashbots on Ethereum) | Routes searcher bundles to validators, takes a cut. |
| Victim (you, often) | Pays slightly more on a swap than they would have without MEV. |
For an average swap, victim cost is small — fractions of a percent. For a large, slow swap on a thin pool, MEV can eat several percent.
Defending yourself
You can't make MEV go away, but you can make yourself a less attractive target:
- Use private order flow — bundle services like Jito (Solana) or Flashbots Protect (Ethereum) submit your transaction without exposing it to the public mempool.
- Tight slippage — if your slippage tolerance is 0.5% instead of 5%, sandwiches stop being profitable on you.
- Split big swaps — many small trades present less surface area than one big one.
- Use routing APIs that bundle defensively — Venum's
/v1/swapsubmits via Jito by default for Solana swaps, removing most of the sandwich risk. The dedicated/v1/bundleendpoint lets you submit atomic 1–5-tx Jito bundles when you need stricter ordering.
What the deeper pages cover
- MEV Searchers → — the bots and the people behind them
- Sandwich Attacks → — the most-discussed form of MEV
- Frontrunning → — older sibling of sandwich
- Backrunning → — the "polite" version, sometimes legitimate
Read next
- Solana RPC → — the infrastructure layer searchers depend on
- Solana Shreds → — Solana's pre-mempool tx visibility model
- Glossary → — every term defined
FAQ
Is all MEV bad?
No. CEX/DEX arbitrage and backrunning of large mispriced trades make markets more efficient — they shrink the price gap between venues. The harmful forms are sandwich attacks and adversarial frontrunning that extract value from retail.
Can I become an MEV searcher?
Mechanically yes; practically very hard. The barrier to entry has risen sharply since 2022 — searchers compete on infrastructure (private RPC, co-location, custom relays) and on the depth of their opportunity-finding code. Solo operators are rare today.
Does Solana have less MEV than Ethereum?
Different, not necessarily less. Solana lacks a public mempool, so traditional sandwiching is harder. But the fast block time + Shreds visibility creates new opportunities (especially backrunning and DEX↔DEX arb).
How much MEV gets extracted in a year?
Order of magnitude: billions of dollars annually across Ethereum + Solana + L2s. The exact number depends on whose dashboards you trust.