Yield farming means providing liquidity or lending assets in decentralised finance protocols in exchange for rewards, usually paid in the protocol's token, trading fees, or both. Farmers deposit assets into liquidity pools or lending markets, and the protocol uses those assets to facilitate trading or borrowing, sharing revenue or incentives with depositors. Advertised yields can look spectacular, but they reflect real risks and often temporary incentives, not guaranteed returns, and beginners should understand those risks before depositing anything.

Impermanent loss is the most misunderstood yield farming risk. When you provide liquidity to a pair of assets, such as two tokens in a trading pool, and their prices move relative to each other, withdrawing your assets may give you less total value than simply holding the original tokens would have. The loss is called impermanent because it disappears if prices return to their original ratio, but it becomes permanent when you withdraw while prices have moved. High yields can compensate for impermanent loss, but they do not eliminate it, and volatile pairs carry far more of it than stable pairs.

Smart contract risk is the risk that the code governing a protocol contains a bug or vulnerability that attackers exploit, potentially draining deposited funds. Audits reduce that risk but do not eliminate it, because audited protocols have still been exploited, and unaudited protocols carry substantially higher risk. Beginners should favour protocols with multiple audits, long track records, transparent teams, and significant total value locked, while treating brand-new, unaudited protocols offering extreme yields as high-risk experiments, not safe investments.

Liquidation risk applies when yield farming involves borrowing, such as depositing collateral to borrow another asset for further farming. If the collateral's value falls relative to the borrowed asset, the position may be liquidated automatically, often with a penalty, and the farmer can lose a significant portion of their deposit. Leverage amplifies both yields and losses, and beginners should avoid leveraged farming entirely until they fully understand liquidation thresholds, health factors, and how quickly volatile markets can move against a leveraged position.

Reward token risk is another factor that high yields hide. Many farming rewards are paid in a newly issued token whose price can fall sharply as farmers sell their rewards, diluting the value of future rewards. A yield quoted as a high annual percentage at today's token price may be worth far less in a month if the reward token drops, and calculating yield in fiat terms, after accounting for reward token price changes, often tells a very different story from the headline percentage. Always ask what token pays the yield and how sustainable its issuance is.

Other risks include bridge risk when moving assets between chains, governance risk when token holders vote to change protocol rules, and regulatory risk, which varies by jurisdiction and can affect access or tax treatment. None of these risks means yield farming should never be attempted, but together they mean it should never be attempted with funds you cannot afford to lose, or with a share of your portfolio that would seriously damage your finances if the position failed completely.

Beginners can limit risk with simple rules: start with small amounts on established protocols, prefer stable or low-volatility pairs while learning, avoid leverage, diversify across protocols rather than concentrating in one, and set a clear exit plan before depositing. Track your positions, including entry prices, rewards earned, and fees paid, and review them regularly, because a position that made sense at entry may no longer make sense after yields fall or risks rise. Yield farming rewards learning and caution; it punishes haste and greed more reliably than almost any other crypto activity.