State Street SPDR Portfolio Intermediate Term Corporate Bond ETF (SPIB) Expected Move

Expected move estimates the probable price range for a given period based on at-the-money options pricing. It reflects the market consensus for volatility over the selected timeframe.

State Street SPDR Portfolio Intermediate Term Corporate Bond ETF (SPIB) operates in the Financial Services sector, specifically the Asset Management - Bonds industry, with a market capitalization near $10.97B, listed on AMEX, carrying a beta of 0.69 to the broader market. The State Street SPDR Portfolio Intermediate Term Corporate Bond ETF seeks to provide investment results that, before fees and expenses, correspond generally to the price and yield performance of the Bloomberg Intermediate US Corporate Index (the "Index")One of the low cost core State Street SPDR Portfolio ETFs, a suite of portfolio building block designed to provide broad, diversified exposure to core asset classesA low cost ETF that seeks to offer precise, comprehensive exposure to US corporate bonds that have a maturity greater than or equal to 1 year and less than 10 yearsThe Index includes investment grade, fixed rate, taxable, US dollar denominated debt with $300 million of par outstanding, and is market cap weighted and reconstituted on the last business day of the month public since 2009-02-20.

Snapshot as of May 15, 2026.

Spot Price

$33.28

Expected Move

1.1%

Implied High

$33.63

Implied Low

$32.93

Front DTE

34 days

As of May 15, 2026, State Street SPDR Portfolio Intermediate Term Corporate Bond ETF (SPIB) has an expected move of 1.06%, a one-standard-deviation implied price range of roughly $32.93 to $33.63 from the current $33.28. Expected move is derived from at-the-money straddle pricing and represents the market's pricing of a ±1σ move. Roughly 68% of outcomes should fall within this range under lognormal assumptions, though empirical markets have fatter tails.

SPIB Strategy Sizing to the Expected Move

With State Street SPDR Portfolio Intermediate Term Corporate Bond ETF pricing an expected move of 1.06% from $33.28, risk-defined strategies sized to the implied range structurally target the modal outcome distribution. Iron condors with wings at the ±1σ expected move boundaries collect premium against the ~68% probability that spot stays inside the range under lognormal assumptions; strangles set wider at ±1.5σ or ±2σ target the tails but pay smaller per-trade premium. Long-vol structures (long straddles, ratio backspreads) profit when realized move exceeds the implied move, the inverse trade: they bet against the lognormal assumption itself, capitalizing on the empirically fatter equity-return tails.

Learn how expected move is reported and how to read the data →

Per-expiration expected move for SPIB derived from ATM implied volatility at each listed expiration. Implied high/low bounds are computed as $33.28 × (1 ± expected move %). One standard-deviation range under lognormal assumptions, roughly 68% of outcomes fall inside.

Frequently asked SPIB expected move questions

What is the current SPIB expected move?

As of May 15, 2026, State Street SPDR Portfolio Intermediate Term Corporate Bond ETF (SPIB) has an expected move of 1.06% over the next 34 days, implying a one-standard-deviation price range of $32.93 to $33.63 from the current $33.28. The expected move is derived from at-the-money straddle pricing and represents the market consensus for a ±1σ price move.

What does the SPIB expected move mean for traders?

Roughly 68% of outcomes should fall within ±1 expected move and 95% within ±2 under lognormal assumptions, though equity returns have empirically fatter tails than log-normal predicts. Strategies sized to the expected move (iron condors at ±1σ, strangles at ±1.5σ) target the typical outcome distribution; strategies that profit from tail moves (long-vol structures, ratio backspreads) target the tails the lognormal model under-prices.

How is SPIB expected move calculated?

The expected move displayed here is derived from at-the-money implied volatility scaled to the chosen tenor: expected move % is approximately ATM IV times sqrt(T / 365), where T is days to expiration. An equivalent straddle-based form: the ATM straddle (call + put at the same strike) is roughly sqrt(2/pi) times spot times IV times sqrt(T/365), so the implied one-standard-deviation move is approximately 1.25 times ATM straddle divided by spot. The two formulations agree once the sqrt(2/pi) constant is reconciled.