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 periodicals archive ?
Summary: It's a known fact that Turkey and Iran have been locking horns over Syria.
Last series we saw the two great anti-heroes locking horns with their marriage struggling and Frank's presidency limping along.
They were locking horns in tournaments as long ago as the 1980s but are said to be good mates away from the table.