Firefly, a high performance, low fee Decentralized exchange, will launch with deep liquidity bolstered by some of the largest market-makers (MMs) in crypto. The newly announced $22.8mm raise for the market-making fund comes from Hypersphere, Polychain, DeFiance, Alameda, CMS, Divergence, MGNR, Altonomy, and more. The capital has been pledged for an on-chain loan to MMs who will provide liquidity to the orderbooks on Firefly. Community members and interested parties can also participate in this on-chain program once Firefly launches, which is expected soon after the Polkadot Parachain auctions later this year.

"By integrating state-of-the-art scaling technology like rollups into its high-performance DEX, and by ensuring deep liquidity from day 1, Firefly is setting itself up to be a critical piece of DeFi infrastructure in the nascent Polkadot ecosystem. We're thrilled to be supporting the protocol at launch, and excited for the future of both Firefly and the emergent Polkadot DeFi space," added Polychain's Ben Perszyk

Firefly has the backing of a strong lineup of leading market makers, one of which recently signed on as a market maker on Firefly and will quote select markets with a spread of three to five basis points from its pricing model deployed on Binance, significantly lower than the industry standard. For example, when DOT/USDT perpetuals are at $18.122 on Binance, the bid on Firefly would be $18.119 and the ask would be at $18.125, with over $400k of liquidity within 0.5% spread. To make this happen, the market maker requires $400k of liquidity to quote orders for each pair, which will come from the on-chain loan program.

An Overview of How Market-Making Works

Market-makers are market participants that place both buy and sell orders for some tradable asset. MMs provide an essential service of efficient markets, allowing traders to open and exit positions smoothly at close to fair prices. In return, MMs capture the market-maker spread or the bid-ask spread from traders' activity. To illustrate how this works, let's imagine an XYZ/USD market where the fair price for the XYZ asset is 100 USD. For simplicity, let's say that the MM places the closest bid (buy order) at 99 USD per XYZ and the nearest offer (sell order) at 101 USD per XYZ. If both orders get filled by other market participants, then neglecting fees, the MM takes home a profit of 2 USD for each unit of XYZ.

This article aims to provide the intuition behind how MM can be done using two oversimplified approaches. However, it's important to note that these are generalizations, and are not mutually exclusive. In reality, all MMs have different ways of quoting markets and profiting from the bid-ask spread.

The first approach involves quoting bids and offers around a fair price on a single exchange using a statistical assumption that the demand from sellers and buyers is balanced in the long run. For that reason, we will call it a statistical approach. This approach requires modeling the markets to continuously determine the fair price and update the quotes around the fair price of an asset, such as XYZ, for example.

The second way to make markets is to replicate prices from another exchange with extra spread. For example, when the bid price for XYZ on Binance is 99 USD, and the offer price is 101 USD, the MMs would quote a bid at 98.5 USD and offer XYZ for 101.5 USD on Firefly. Whenever someone hits the 98.5 USD bid on Firefly, the MMs would immediately sell on Binance at 99 USD. The reverse is also true; whenever someone lifts the 101.5 USD offer on Firefly, the MMs buy XYZ for 101 USD on Binance. Assuming the 0.5 USD difference covers the transaction fees on the two exchanges, the MMs pocket risk-free profit and stay neutral to market movements thanks to balanced exposure on the long and short sides. For that reason, we will call this approach a hedging or delta-neutral approach. The example above is for two exchanges, but the hedging approach to making markets can be extended to many exchanges simultaneously.

Lower Spreads with Statistical Approach to Market-Making

Statistical MM relies on continuously analyzing price feeds and information from many sources to update the quoting strategy. Fed with past data, a pricing model continuously computes a fair price for an asset to layer bids and offers around it and profit from the spread. The quotes move up and down accordingly when the fair price changes. This way of MM facilitates markets with small bid-ask spreads but without much depth in the orderbook.

Higher Depth with Delta-Neutral Approach to Market-Making

The hedging or delta-neutral MM refers to simultaneously quoting markets on different exchanges and balancing the overall risk exposure to stay neutral to market movements. Whenever their sell order gets filled on one exchange, a MM looks to buy the same asset a little cheaper elsewhere, intending to capture the bid-ask spread. Such MMs aim to minimize exposure to market volatility and always stay protected from volatility. The significant advantage here is that hedging MMs are exposed to less risk and can quote much more depth. However, the bid-ask spreads are typically higher since MMs need to pay two maker or taker fees on the two exchanges they use for hedging. Hedging MMs are also able to quote markets with leverage more easily than statistical MMs.


Compared to hedging MM, the advantages of statistical MM are fewer trading fees, absence of overhead costs due to moving spot inventory, lower bid-ask spread, higher uptime, resilience to volatility, lower capital requirement. In turn, compared to statistical MM, the advantages of hedging MM are less market risk, higher market depth, and that it is easier to use leverage to make markets. The hedging MM style is also conceptually easy to understand and proven effective.


One downside of the hedging MM is that staying delta-neutral isn't always easy in practice. Other disadvantages are managerial costs associated with the periodic rebalancing of spot inventory, and volatility. For instance, when a lot of selling or buying occurs on one side of the market, the MM may run out of capital and have to rebalance funds between exchanges or add funds. This process takes time and limits uptime. Additionally, when prices move fast, hedging becomes hard. Hedging MM becomes more challenging during market volatility as balancing exposure becomes difficult in a rapidly falling or rising market. In such times, hedging MMs pull their quotes out entirely and leave the orderbook empty. That's why the hedging MM style has negative skew - it makes small profits most of the time but can result in infrequent, significant losses during market volatility.

On the other hand, statistical MMs models typically never stop quoting markets. Instead, when momentum picks up, the statistical approach leaves the MM with price exposure, often one-sided, a significant disadvantage. Another disadvantage is the markets are difficult to model, and profitable models don't stay profitable long.



Whereas statistical MMs provide low bid-ask spreads, hedging MMs offer high market depth. Given their complementary nature, combining both MM styles yields the most efficient markets. We believe that both approaches are valuable, and thus, we signed up both types of MMs to provide the traders on Firefly some of the most liquid markets in the world!

"Still in its nascent stage, the DeFi industry has been rapidly catching up to the centralized service providers. Now is an exciting time for derivative DEXs. The spreads and liquidity in decentralized markets are improving, while the user experience in terms of latency and cost is becoming comparable to that on centralized exchanges. With this growth, there is also a lot of chaos, making it hard to know which projects are outstanding and which ones say they are. I am excited to work with the Firefly team and play a part in building an outstanding DEX for derivatives," said Yang Li, co-founder of Bitlink, one of the leading market-makers on Binance PnL boards.

If you are interested in trading perpetuals, options, or other derivatives then please join the growing community on Discord and sign up for updates at

Disclaimer: The products available on Firefly are not available for US Persons or residents of any country or jurisdiction subject to US sanctions.

- Firefly