same-day substitution

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Same-day substitution

Offsetting changes in a margin account during the day that result in no overall change in the balance of the account.

Same-Day Substitution

In a margin account, a situation where the value of some securities rise and some others decline on the same day, such that there is no net change to the account's aggregate value at the end of the trading day.

same-day substitution

Changes in a margin account that offset such that there is no change in the total value of the account. For example, an increase in the market value of one security may offset the market decline in another security so that no margin call is required.