Tick size
Trading & ordersThe smallest increment by which a security's price may move, typically 5 paise for most Indian equities.
In plain terms
It sets a floor on how tight a bid-ask spread can ever be. That floor bites hardest in low-priced stocks, where one tick is a meaningful percentage.
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DerivativesAlso called: Contract specifications
The exchange document defining a derivative contract — lot size, quotation unit, tick size, expiry, settlement basis, and for a deliverable commodity the grade and delivery centre.
In plain terms
For a commodity this is the nearest thing to reading an annual report. It tells you what would actually be delivered, where, and in what quantity, which is what the price is a price of.
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