IIGD vs VTC

IIGDAInvesco Investment Grade Defensive ETF

VTCAVanguard Total Corporate Bond ETF

In short

IIGD Most investment-grade corporate funds just buy the whole market. IIGD screens it first: higher-quality issuers, shorter maturities, roughly 160 bonds, 0.13% a year. A defensive tilt inside the calmer corner of credit.

VTC Most cheap corporate bond funds sell you one slice of the maturity curve. VTC buys the whole investment-grade corporate market, short to long, for 0.03% a year, and since 2025 it owns the bonds directly instead of stacking three Vanguard funds.

Stated mandate

IIGD The Fund seeks exposure to U.S. investment-grade bonds with relatively higher credit quality and shorter maturities, using representative sampling of its underlying index.

VTC The Fund seeks to track a broad, market-weighted corporate bond index, specifically the Bloomberg U.S. Corporate Bond Index. It uses an indexing approach focused on investment-grade, fixed-rate, taxable corporate bonds.

Why people hold it

• IIGD Defensive by design. The index targets U.S. investment-grade bonds with relatively higher credit quality and shorter maturities, so you hold a screened slice rather than the whole corporate market.invesco.com
• 0.13% a year undercuts the typical investment-grade corporate ETF, which is unusual for a rules-based screen rather than a plain market-cap index.
• Roughly 160 bonds, sampled to follow the index closely, with cash paid out monthly. On measured tracking and portfolio build it sits in the upper half of its investment-grade corporate peer group.

• VTC 0.03% a year against a 0.19% median for investment-grade corporate ETFs. On this exact Bloomberg index, nothing in the group charges less.
• One ticker, the full corporate curve. Top-graded rivals like VCIT, IGIB and IGSB each buy a single maturity band; VTC's index spans short, intermediate and long fixed-rate corporates.
• No overlays, no active tilts, no credit guesswork. Market-weighted indexing of investment-grade, fixed-rate, taxable corporates, and the portfolio hews tightly to that mandate.
• Income lands monthly, not quarterly, which matters if bond coupons are doing real work in your cash flow.

Worth knowing

• IIGD The screen cuts both ways: shorter maturities and higher-rated issuers mean less interest-rate and credit risk than a broad corporate index, and less of the extra yield that comes with them.
• Small and thinly traded next to the category giants. Spreads can be wider than headline funds, so limit orders matter, and modest assets are worth watching in any niche fund.
• Cheap for what it does, but not the floor: the big broad corporate index funds (VCIT, USIG, SPIB, IGIB) charge a few basis points for whole-market exposure.

• VTC Whole-curve means long bonds in the mix, so prices move more with interest rates than a 1-5 year slice like IGSB does.
• The plumbing changed in March 2025: Vanguard moved it from holding three underlying corporate bond ETFs to buying the index bonds directly. Same objective, same index.sec.gov
• Moderately traded rather than a volume heavyweight, so spreads can run wider than the busiest corporate bond funds, particularly in choppy markets.

Full IIGD profile⁠

Full VTC profile⁠