SMMD vs VB

SMMDAiShares Russell 2500 ETF

VBAVanguard Morningstar Small-Cap ETF

In short

SMMD Most small-cap funds stop at the Russell 2000. SMMD keeps going, tracking the Russell 2500: that index plus the 500 smallest mid-caps from the Russell 1000. The whole small-to-mid band in one ticker.

VB Vanguard's small-cap workhorse: roughly 1,400 smaller US companies for three basis points. The CRSP index behind it shifts stocks between size bands in two half steps instead of one jump, which holds turnover down. Trading since 2004.

Stated mandate

SMMD The fund tracks the Russell 2500 Index, an index representing small- to mid-capitalization U.S. equities.

VB The fund seeks to track the CRSP US Small Cap Index, which measures the investment performance of small U.S. companies. It uses an indexing approach and generally replicates the index by holding its securities in approximately their index weights.

Why people hold it

• SMMD The Russell 2500 is the Russell 2000 plus the 500 smallest mid-caps from the Russell 1000, so you get the small-to-mid handoff without stitching two funds together.lseg.com
• Plain index beta: cap-weighted, reconstituted annually by FTSE Russell, no screens or factor tilts. One mandate since the 2017 launch, and what it holds matches what it says.lseg.com
• 0.15% net of a waiver through July 31, 2027 (0.23% gross), which sits near the category median rather than at the premium end.
• A multi-billion-dollar iShares fund that pays quarterly, so this is a long-standing shelf product rather than a thin niche launch.

• VB Three basis points a year, against a small-cap category median near 0.25%. Cost is the one edge in indexing you actually keep.
• About 1,400 stocks held at roughly their index weights, so no single small-cap story carries the fund.vanguard.com
• Its CRSP benchmark migrates a stock between size segments in two 50% packets instead of one move, a design built to cut turnover.crsp.com
• Running since 2004, actively traded, and one of the strongest implementations in its 20-fund small-cap peer group.

Worth knowing

• SMMD Cost is the trade-off: the cheapest small-cap index peers charge far less (SCHA and VB at 0.03%), and the fee steps up toward 0.23% if the waiver lapses after July 31, 2027.
• Not a pure small-cap sleeve. Those 500 mid-caps overlap with any mid-cap fund you already own, so the two can double up.lseg.com
• Moderately traded rather than one of the category's volume giants, which can show up as wider spreads on larger orders.

• VB Small companies move harder in both directions than large-cap benchmarks, and this is full, unhedged exposure to that.
• Benchmarks disagree on where small cap starts. VB follows CRSP, while IWM and VTWO track the Russell 2000, so holdings and results can drift apart.
• US companies only, and distributions land quarterly rather than monthly.

Full SMMD profile⁠

Full VB profile⁠