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✏️ '''Lead line''' is the [[Definition:Line | line]], or percentage share, of a [[Definition:Risk | risk]] written by the [[Definition:Lead underwriter | lead underwriter]] on a [[Definition:Subscription market | subscription]] placement. In markets such as [[Definition:Lloyd's | Lloyd's]] and the London company market, where multiple [[Definition:Insurer | insurers]] and [[Definition:Syndicate | syndicates]] subscribe to the same [[Definition:Slip | slip]], the lead line carries particular weight because the lead underwriter sets the [[Definition:Terms and conditions | terms, conditions]], and [[Definition:Premium | pricing]] that following markets then decide whether to accept. The size of the lead line signals the lead's conviction in the risk — a large lead line tells the market that the underwriter has done thorough due diligence and is prepared to bear meaningful exposure.

🔍 When a [[Definition:Broker | broker]] presents a risk for placement, securing an adequate lead line is typically the first and most critical step. The lead underwriter evaluates the [[Definition:Submission | submission]], negotiates terms with the broker, and stamps the slip with their line — often ranging from 5% to 25% or more depending on the class and the lead's capacity appetite. Following underwriters review the lead's terms and may agree to write their own lines on the same basis, or they may decline if they find the pricing inadequate. In practical terms, a strong lead line accelerates placement because following markets take comfort from a credible lead's commitment. Regulatory frameworks, particularly [[Definition:Lloyd's | Lloyd's]] minimum standards, sometimes prescribe minimum lead line sizes for certain classes to ensure that the lead underwriter retains sufficient "skin in the game" and exercises genuine [[Definition:Underwriting discipline | underwriting discipline]] rather than merely lending its stamp.

💡 Beyond its mechanical role in filling a placement, the lead line embodies the broader market governance function of the subscription model. It creates an incentive structure in which the lead underwriter's reputation and financial exposure align with the quality of the risk assessment — a dynamic that helps discipline pricing across the market. Conversely, a declining trend in lead line sizes can signal softening market conditions, where leads accept thinner participations to win business, potentially weakening underwriting rigor. For [[Definition:Managing general agent (MGA) | MGAs]] and [[Definition:Coverholder | coverholders]] operating under [[Definition:Binding authority agreement | binding authority agreements]], the lead insurer's line also determines who exercises [[Definition:Claims authority | claims control]] and whose policy wording governs the contract — making it a structural pillar of delegated authority arrangements.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Lead underwriter]]
* [[Definition:Following market]]
* [[Definition:Subscription market]]
* [[Definition:Slip]]
* [[Definition:Line]]
* [[Definition:Signing down]]
{{Div col end}}

Definition:Lead line - Revision history

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