Been digging into bond ETFs lately and found something interesting comparing two popular options. If you're looking at IGIB and MUB, they're actually pretty different despite both being iShares products.

So IGIB is the corporate bond play - it's got over 3,000 investment-grade corporate bonds with 5-10 year maturities. You get a 4.6% dividend yield and the expense ratio is just 0.04%. The trade-off? It's riskier. Over the past 5 years, it had a max drawdown of around 20.6%. Still, if you want straight income from corporate lending, this is solid.

MUB is the municipal bond fund, and here's where it gets interesting for tax planning. It holds over 6,200 tax-exempt municipal bonds, which means the income is federally tax free. That's huge if you're in a high tax bracket. The yield is lower at 3.1%, but remember - that's tax-free income. The expense ratio is marginally higher at 0.05%, and the risk profile is gentler with a max drawdown around 11.9%.

Looking at the numbers, IGIB returned 3.8% over the past year while MUB did 1.4%. But MUB's tax-free status changes the math depending on your bracket. If you're paying 35%+ in taxes, that tax-free yield might actually beat IGIB's after-tax return.

The real question for me is whether you want higher nominal yield or tax efficiency. IGIB if you're chasing income and can handle volatility. MUB if you want that tax-free advantage in a taxable account. Both are solid diversified plays, just different strategies for different situations.