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Quantitative Finance · Glossário

O que é Margin optimisation?

Definition 14.4 The Desk and the Firm · Capítulo 14 — Treasury and Funding

Margin optimisation is the choice of where to hold each position, and how to pair positions within each account, so that the total margin and financing cost across a firm’s brokers and clearing houses is least for the same book.

allocationmargin Amargin Bmargin Ctotal marginannual cost
all at A71.55––71.556.88
all at B–72.00–72.005.99
all at C––144.00144.0010.92
pro rata14.6024.0015.0053.605.82
optimised20.406.007.5033.904.98
Table 14.1. House margin and annual cost (margin at a 5% cost of cash plus financing) of the chapter’s book under five allocations across three prime brokers, $ million. Data: fm_treasury.summary.
House margin on the same book under five allocations across three prime brokers. The linear programme of  keeps each broker’s slice balanced and cuts margin by 53% against the cheapest single broker. Data: fm_treasury.summary.
Figure 14.2. House margin on the same book under five allocations across three prime brokers. The linear programme of Proposition 14.5 keeps each broker’s slice balanced and cuts margin by 53% against the cheapest single broker. Data: fm_treasury.summary.
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