Three layers of the same market
Institutional trading is organised as a stack. At the top sit the tier 1 banks that make prices and extend credit; at the bottom sit the individual traders. Prime brokers, prime-of-primes and retail brokers occupy three rungs of that stack, and each is, in effect, a client of the rung above. Understanding which rung a counterparty sits on tells you who it serves, what it requires, and what it can actually provide.
Prime broker
A prime broker is typically a tier 1 bank or major institution that provides financing, custody, clearing, credit and liquidity to the world's largest funds, banks and trading firms. It is the primary source of institutional liquidity and credit. In return it demands high minimum balances, substantial capital, and meaningful volume — thresholds that put a direct relationship out of reach for most brokers and mid-sized funds.
Prime of Prime
A Prime of Prime (PoP) sits one layer below. It is a client of one or more prime brokers, and it re-packages that access: it aggregates liquidity from multiple bank and non-bank sources into a single feed, intermediates credit on the strength of its own prime brokerage relationships, and delivers execution technology, risk tools and reporting. The result is tier 1 depth and credit made reachable — on commercially accessible terms — for firms that could never meet a bank's direct threshold. This is the model PrimeBrokerLiquidity operates; the Prime of Prime pillar guide covers it in depth.
Retail broker
A retail broker serves individual, non-professional traders. It provides trading platforms, onboarding and market access to the public, and it sources its own liquidity upstream — frequently from a Prime of Prime. It faces retail conduct regulation and consumer protections that do not apply between institutional counterparties. Crucially, a retail broker is a distributor of market access to end clients, not a wholesale liquidity source.
Side by side
The table below sets the three layers against the questions that matter most: who they serve, what they require, and what they provide.
| Dimension | Prime broker | Prime of Prime | Retail broker |
|---|---|---|---|
| Who it is | A tier 1 bank or major institution | An intermediary holding prime brokerage relationships | A firm providing platforms and market access to the public |
| Who it serves | The largest banks, hedge funds and institutions | Mid-sized brokers, hedge funds, asset managers, family offices, fintech firms | Individual, non-professional retail traders |
| Requirements to onboard | High minimum balances, capital, credit and volume thresholds | Commercially accessible minimums; institutional KYC and due diligence | Low minimums; retail account opening and suitability checks |
| Liquidity | The bank's own pricing and balance sheet | Aggregated tier 1 bank and non-bank sources in one feed | Sourced upstream — often from a PoP or aggregator |
| Credit | Direct bilateral facility with the bank | Credit intermediation — trade without a direct bank facility | Client margin posted to the broker |
| Connectivity | Multiple bilateral bank relationships | A single FIX or bridge integration | Retail platforms (MT4/MT5, cTrader, proprietary apps) |
| What it provides | Financing, custody, clearing, credit, liquidity | Aggregated liquidity, credit, execution tech, risk & reporting | Platforms, market access, client support |
| Typical regulation | Bank / institutional regulation | Institutional-counterparty basis | Retail conduct rules and consumer protections |
Illustrative, structural comparison. Specific terms, thresholds, coverage and regulatory treatment vary by firm and jurisdiction.
Who should use a Prime of Prime?
A Prime of Prime is the right layer for a firm that trades at institutional size but cannot — or would rather not — go direct to a tier 1 bank. That describes most mid-sized brokers, many hedge funds and asset managers, family offices and fintech firms building trading products. For these counterparties, a PoP delivers three things a direct bank relationship rarely can at their scale: aggregated depth no single mid-sized firm could assemble alone, credit intermediated so they avoid posting to each venue directly, and a single integration instead of a patchwork of bilateral facilities.
Retail traders, by contrast, do not use a PoP directly — they trade through a retail broker, which may itself be a PoP client. And the largest institutions that already clear a bank's thresholds may deal with prime brokers directly. The PoP occupies the middle: the firms too large for retail, too small for a bank's front door. For a practical selection framework, see how to choose a liquidity provider, and who we serve for coverage by client type. Terms used here are defined in the glossary.