Lock

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Lock

Used in the context of general equities. Make a market both ways (bid andoffer) either on the bid, offering, or an in-between price only. Locking on the offering occurs to attract a seller, since the trader is willing to pay (and ask) the offering side when others only ask it. Locking on the bid side attracts buyers for similar reasons. Typically, the sell side requires a plus tick to comply with short sale rules.
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References in periodicals archive ?
These numbers were for preservative-free, porcine heparin lock flush 100 units/mL intravenous solution, containing heparin, sodium chloride, and hydrochloric acid or sodium hydroxide as needed for pH.
Other known complications from the use of a tunnelled CVC for haemodialysis are stenosis or occlusion of the subclavian vein (Karapolat et al., 2005) and the increased risk of haemorrhage from inadvertent administration of heparin locks. A normal activated partial thromboplastin time (APTT) is expected after dialysis using unfractionated heparin; however, it has been demonstrated that a normal APTT at dialysis completion is abnormal 10 minutes after routine heparin locking of a CVC as the lock recommendations result in systemic spillover (Karaaslan, 2001).
Pharmacopeial Convention (USP) updated labeling standards for Heparin Sodium Injection, USP and Heparin Lock Flush Solution, USP (including heparin prefilled flush solutions).
The comparison arm of the study used the standard heparin lock for all three treatments during the week.

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