When you stake into a subnet, or sell alpha back to TAO, your transaction trades against a liquidity pool. That makes it visible while it waits to be included in a block, and a visible trade can be front-run. MEV Shield is how taostats hides your transaction until it is already in a block. This post covers what it does, what you will see when you stake, and when it turns itself off.
Trading through a pool always moves the price. Part of that is price impact, which is predictable from the size of your trade and the depth of the pool. The rest is slippage from other trades: between the moment you submit and the moment you land, someone else may stake or unstake in the same pool and shift the price.
Usually that is a coincidence. Sometimes it is not. An MEV bot that watches pending transactions can spot your stake, place its own trade just ahead of yours and take a profit from the price move your trade causes. The result is a worse fill for you and a gain for the bot.
