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Quantitative Finance · Glosarium

Apa itu Wholesaler and internalisation?

Dikenal juga sebagai: wholesaler · internalisation

Definition 10.1 Markets I: The Ecosystem and Exchange-Traded Markets · Bab 10 — Retail Flow and Wholesaling

A wholesaler is a market-making firm that receives the marketable orders of retail brokers’ customers and executes most of them as principal, against its own account, away from any exchange. Internalisation is the execution of a client order against the executing firm’s own inventory instead of against other investors’ orders on a venue.

A retail market order. The wholesaler fills it from inventory at the national best price or slightly better, pays the broker, and manages the resulting position on exchanges and in dark pools. Only that residual hedging reaches a public order book.
Figure 10.1. A retail market order. The wholesaler fills it from inventory at the national best price or slightly better, pays the broker, and manages the resulting position on exchanges and in dark pools. Only that residual hedging reaches a public order book.

Contoh

Example 10.6 (Reading one fill)

The national best quote is 20.00×20.0220.00 \times 20.02; a customer’s market purchase of 100 shares is filled at 20.018. Price improvement: 0.2 cent a share, 20 cents on the order. Effective half-spread: 20.018−20.010=0.820.018 - 20.010 = 0.8 cent. Five minutes later the mid is 20.013: the realised half-spread is 20.018−20.013=0.520.018 - 20.013 = 0.5 cent and the price impact 0.3 cent. The wholesaler’s gross revenue on this fill was 50 cents, out of which it pays the broker and its own costs.

Example 10.8 (The same cent, two flows)

Take h=1h = 1 cent, J=3J = 3 cents, κ=0.10\kappa = 0.10 cent. On an exchange, where 35% of the orders hitting a quote are informed, a market maker earns 1−1.05<01 - 1.05 < 0 before costs: the quoted spread is, in equilibrium, barely enough. For retail flow with p=5%p = 5\% and θ=20%\theta = 20\%: πmax⁡=0.80−0.15−0.10=0.55\pi_{\max} = 0.80 - 0.15 - 0.10 = 0.55 cent. The wholesaler can pay the broker 0.25 cent and keep 0.30 (Figure 10.2). Nothing here depends on speed or on being cleverer than the customer: the value lies entirely in the segmentation of orders by how much they know.

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