Insights

What Is a Locate in Short Selling?

Alphanume Team · May 1, 2026

Borrow availability before you can legally short — the regulatory and operational prerequisite most retail traders don't realize they're navigating.

A "locate" is the broker's confirmation that shares of the security to be shorted are available for borrow. Under SEC Regulation SHO, brokers must obtain a locate before executing a short sale — the rule was designed to prevent naked shorting, where shares are sold short without any realistic ability to deliver them at settlement. For traders, the locate process is mostly invisible (the broker handles it), but understanding the mechanics clarifies why some shorts are easy to execute and others are not.

The Reg SHO requirement

Reg SHO requires that, before executing a short sale, the executing broker have:

"Borrowed" the security, or
"Entered into a bona fide arrangement to borrow" the security, or
Reasonable grounds to believe that the security can be borrowed and delivered by settlement.

In practice, brokers maintain "easy-to-borrow" (ETB) lists of securities for which the locate is essentially automatic. For non-ETB names — the HTB universe — brokers must obtain a specific locate, typically from another firm with inventory or from a securities-lending agent.

How a locate works in practice

For retail short sales:

Customer enters a short sale order.
Broker checks internal inventory and ETB list. If the name is ETB, the order routes immediately.
If the name is HTB, the broker's locate desk checks external inventory and quotes a borrow rate.
If a locate is available, the order executes at the quoted borrow rate.
If no locate is available, the order is rejected.

For institutional accounts, the locate process is typically handled in advance for the day's anticipated trades, with locates "reserved" against the inventory.

What "locate available" actually tells you

A successful locate confirms:

Shares can be borrowed for the immediate short sale.
The borrow rate at the time of the locate.

It does not guarantee:

That the rate will stay constant. Rates can move intraday or overnight.
That the borrow will remain available. Lenders can recall; brokers can lose inventory access. See buy-in risk.
That additional capacity will be available later in the day if you want to add to the position.

Locate fees

Some brokers charge separate fees for locates, particularly in HTB names:

Per-locate fee. A flat charge per locate request.
Locate inventory fee. A charge for reserving locate capacity even if not used.
Borrow rate. The ongoing daily charge for the borrow itself, separate from any locate fee.

For retail accounts, locate fees are typically embedded in the borrow rate rather than charged separately. For institutional accounts, locate desks may charge for the service.

Locate rejection

If no locate is available, the short order is rejected. Reasons for rejection:

Broker has no inventory and cannot source from external lenders.
Locate inventory exists but is reserved for other customers.
Borrow rate would be punitively high and the customer has not opted in to deep HTB rates.
The security is on the broker's "do not borrow" list (special situations, specific securities the broker chooses not to lend).

For HTB names, locate rejection rates can be 50%+ at retail brokers depending on demand and the broker's inventory.

Pre-borrow vs locate

For certain securities or short sale types, brokers may require "pre-borrow" rather than locate. The distinction:

Locate: Confirmation that borrow is available; actual borrow happens at settlement.
Pre-borrow: Borrow is executed in advance of the short sale, with the customer charged for the borrow from the pre-borrow time.

Pre-borrow is more conservative and is required for certain securities (typically those on the "threshold securities list" maintained by the exchanges).

The locate as a market signal

Locate availability and pricing is itself information. Patterns:

Locate availability tightening (rejection rates rising) precedes borrow-fee spikes.
Locate inventory drying up correlates with crowded shorts.
Per-locate fees rising independent of borrow rates can indicate broker-internal demand pressure.

For traders running systematic strategies, monitoring locate availability across multiple brokers provides a leading indicator of supply tightness.

Practical implications

For strategy design:

Backtests assume locate availability; live execution requires confirmed locates. Estimates of strategy capacity should account for locate constraints.
Multi-broker locate aggregation can meaningfully expand the implementable universe of HTB shorts.
For event-driven strategies on specific dates, pre-securing locates before the event date avoids day-of execution risk.