iShares Core 1-5 Year USD Bond ETF (ISTB) Open Interest History

Open interest tracks the total number of outstanding options contracts. Rising OI alongside price moves can indicate growing commitment to the trend; declining OI suggests positions are being closed.

iShares Core 1-5 Year USD Bond ETF (ISTB) operates in the Financial Services sector, specifically the Asset Management - Bonds industry, with a market capitalization near $4.75B, listed on NASDAQ, carrying a beta of 0.40 to the broader market. The iShares Core 1-5 Year USD Bond ETF seeks to track the investment results of an index composed of U. public since 2012-10-24.

Snapshot as of May 15, 2026.

Spot Price

$48.13

Call OI

6

Put OI

1

Total OI

7

As of May 15, 2026, iShares Core 1-5 Year USD Bond ETF (ISTB) has 7 total contracts outstanding across all expirations. Put/call OI ratio is 0.17 (call-heavy positioning). Open interest reflects accumulated positions from prior sessions; persistent growth indicates sustained directional or hedging interest, while sharp drops typically mean post-expiration clean-up.

How ISTB open interest history Data Feeds Strategy Selection

Strategy selection on iShares Core 1-5 Year USD Bond ETF options does not derive from any single metric in isolation. The open interest history view above sits inside a broader read: ATM IV currently sits at 29.1% and dealer gamma exposure is positive, so dealer hedging is mechanically mean-reverting. Combine the open interest history data here with the volatility-skew surface, dealer-gamma exposure, max-pain level, and upcoming-events calendar to build a positioning thesis. Risk-defined structures (credit spreads, debit spreads, iron condors) are usually safer than naked positions while the regime is uncertain; the data on this page anchors the inputs but does not by itself constitute a trade thesis.

Learn how open interest is reported and how to read the data →

Frequently asked ISTB open interest history questions

What is the current ISTB options open interest?

As of May 15, 2026, iShares Core 1-5 Year USD Bond ETF (ISTB) has 7 total contracts outstanding across all listed expirations, split as 6 calls and 1 puts. Open interest reflects accumulated positions from prior trading sessions; it does not include today's volume until end-of-day reconciliation.

What is the ISTB put/call open interest ratio?

Put/call OI ratio of 0.17 is call-heavy, often a directional bullish or upside-speculation signal.

What does ISTB open interest tell traders?

Persistent OI growth indicates sustained directional or hedging interest; sharp drops typically mean post-expiration position cleanup. Heavy OI concentrations at specific strikes act as support and resistance levels because dealer hedging amplifies near those strikes - the gamma profile of the dealer book is concentrated there. Comparing today's volume to standing OI separates opening flow from closing flow.