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.
References in classic literature ?
He sat upon the padded locker, wrapped about very carefully, for the air, though calm, was exhilaratingly cold and clear.
He felt, in the dark, in the locker, put his fingers in the Roman pie, and got some sandwiches, and he also opened rather successfully a half-bottle of champagne.
It was all fitted with lockers from top to bottom, so as to stow away the officers' belongings and a part of the ship's stores; there was a second store-room underneath, which you entered by a hatchway in the middle of the deck; indeed, all the best of the meat and drink and the whole of the powder were collected in this place; and all the firearms, except the two pieces of brass ordnance, were set in a rack in the aftermost wall of the round-house.
It was lucky that some tins of fine preserves were stowed in a locker in my stateroom; hard bread I could always get hold of; and so he lived on stewed chicken, PATE DE FOIE GRAS, aspara- gus, cooked oysters, sardines--on all sorts of abominable sham delicacies out of tins.
The locker was a broad one; Launce was able to seat himself partially behind her.
[1] Davy Jones is the spirit of the sea, or the sea devil, and Davy Jones's locker is the bottom of the ocean; hence, "gone to Davy Jones's locker" signifies "dead and buried in the sea."
Those in the cabin broke into the food lockers, and those above scrambled down and joined them in a feast on our crackers and canned goods.
Hollis, stripped to the waist, lay stretched out on the lockers, with closed eyes and motionless like a despoiled corpse; at his head Jackson twanged the guitar, and gasped out in sighs a mournful dirge about hopeless love and eyes like stars.
Gummidge and Peggotty, who used to whisper of an evening when we sat, lovingly, on our little locker side by side, 'Lor!
"Dad keeps my spare rig where he kin overhaul it, 'cause ma sez I'm keerless." He rummaged through a locker, and in less than three minutes Harvey was adorned with fisherman's rubber boots that came half up his thigh, a heavy blue jersey well darned at the elbows, a pair of flippers, and a sou'wester.
Tartar produced in the Admiral's Cabin by merely touching the spring knob of a locker and the handle of a drawer, was a dazzling enchanted repast.
Whether owing to the almost omniscient look-outs at the mast-heads of the whale-ships, now penetrating even through Behring's straits, and into the remotest secret drawers and lockers of the world; and the thousand harpoons and lances darted along all continental coasts; the moot point is, whether Leviathan can long endure so wide a chase, and so remorseless a havoc; whether he must not at last be exterminated from the waters, and the last whale, like the last man, smoke his last pipe, and then himself evaporate in the final puff.