2013issue C0631
Iceberg hidden size and option-spread packages
A large visible limit can be read as intent in the depth-of-market. Iceberg orders and packaged option tickets exist to protect a fill, and they help only when a simple ticket would leak size or leave a leftover leg.
- An iceberg order rests only a disclosed quantity as a working limit and submits hidden quantity after that slice fills, so the full size stays off the public book.
- Hidden replenishment typically loses queue priority at the limit price, which can reduce the chance of a fill, so small size that would not move the book does not need to be disguised.
- A packaged-spread ticket asks the market to complete every option leg together. Single-leg routing can reach deeper individual-strike books but can leave residual risk.
- Editorial reading: hide size only when a visible limit would leak intent, and package legs only when the spread book is thinner than the strikes.
Visible size is public intent
Depth-of-market books show resting buy and sell limits. Large visible size can be read as directional intent and can move price or block the large order from filling at its intended limit.
A limit order is an instruction to buy or sell only at a stated price or better, and it may rest in the book until it is matched. Once that size is displayed, other participants can react to it.
How an iceberg order hides remaining size
Electronic futures platforms can accept iceberg orders that display only a trader-chosen quantity as a working limit and then submit remaining hidden size after that slice fills. The visible slice is the disclosed quantity. The undisclosed remainder is the hidden quantity.
Large traders use icebergs to keep most of an order off the public book so other participants cannot react to the full quantity at once.
Hidden size is not free
Small retail size usually has little price impact, so disguising quantity is unnecessary. Hidden replenishment loses queue place.
Queue priority is the exchange matching rank at a given price, and newly replenished hidden size typically stands behind later orders already waiting there. That can reduce the chance of a fill at the chosen limit.
Package option legs only when the combination book is thinner
An option spread is a multi-leg option position that is meant to be put on or taken off as one combined trade. Traders generally want both legs completed together. Entering or exiting one leg at a time can miss a simultaneous fill and leave residual risk.
In thinner commodity option markets such as silver or natural gas, a packaged-spread ticket, meaning a single multi-leg limit on the whole spread, is presented as a way to avoid leftover-leg cost and partial-fill risk.
In liquid option markets such as the emini S&P or the 30-year Treasury, individual-strike books can be deeper than any specific multi-leg combination. Packaged tickets can fill worse than separate orders on each leg. Single-leg routing sends each option as its own ticket, which can improve access to those deeper books but can leave a leftover leg.
All readings on this track · 20 readings
- 1994Cash-first stops beyond crowded landmarks
- 1996Index spread pairs with seasonal filters and limit orders
- 2003Precommit the stop and limit after a rule-based entry
- 2005Limit orders, routing paths, and commission tradeoffs
- 2005Bracket orders that precommit stop and target exits
- 2005Precommit a stop-loss at entry with pivot triggers
- 2006Mechanical systems need fill-aware failure modes
- 2006Ranking near-term support for ETF limit entries
- 2007Precommit futures stops and limits with contingent orders
- 2007Overnight option limit fills, stops and trailing exits
- 2010Seasonal commodity windows and stop-limit fill risk
- 2011Routing fees, do-not-ship flags, and maker-taker limit orders
- 2011A three-bar inside-bar commodity setup still needs portfolio context
- 2012Limit orders when a tick saved costs the fill
- 2013Futures platform order entry and per-trade fees
- 2013Iceberg hidden size and option-spread packages
- 2014Marketable limits, directed venues, and spread filters
- 2015Filtering commodity option liquidity by spread, not open interest
- 2015Paired range-bar averages and next-bar limit exits
- 2019Uneven-wing modidor as one limit package