Fixed Income vs. Equity Portfolio Management

Everything so far in this track applies to both. This chapter covers what's genuinely different about managing a fixed-income mandate versus an equity mandate — distinct enough that they're usually run by entirely different teams with different skill sets.

Duration matching — a fixed-income-specific discipline with no real equity equivalent

A fixed-income portfolio manager often runs against a real, practical constraint: matching the portfolio's overall duration (Finance 101's rate-sensitivity concept) to a target — often driven by a liability the portfolio is meant to fund (a pension fund matching bond duration to its future payout obligations, a strategy called immunization) or simply a mandate-specified target duration versus a benchmark.

Worked example: a pension fund has liabilities with an effective duration of 12 years. Its bond portfolio currently has a duration of 8 years — too short, leaving the fund exposed to falling rates (which would raise the present value of its liabilities more than its assets, per Finance 101's core duration mechanic, run against the liability side instead of just the asset side). The manager needs to extend duration — by shifting into longer-maturity bonds or adding interest-rate derivatives — to close that 4-year gap and properly hedge the fund's real, long-term obligations. There's no real equivalent decision in equity portfolio management — nothing in an equity mandate maps onto "duration" in this direct, liability-driven way.

Credit selection — a genuinely different research skill from equity research

A fixed-income analyst evaluating a corporate bond is asking a fundamentally different question than an equity analyst: not "how much upside does this stock have," but "what's the real probability this issuer pays me back everything owed, on time, in full" (Finance 101's credit-spread concept). This asymmetry — a bond's best-case outcome is simply getting paid back in full, while its downside is a real loss — makes credit research skew much more heavily toward downside identification (balance sheet strength, covenant protection, industry cyclicality) than equity research's more two-sided upside/downside framing.

Equity portfolio management — sector, factor, and stock-specific tilts

An equity portfolio manager's core decisions are the ones Finance 101's factor-investing deep dive covered directly: how much sector exposure to take relative to a benchmark, how much factor tilt (value, momentum, quality) to run, and how much of the portfolio's risk comes from genuine stock-specific views versus broader, more systematic tilts. This is a meaningfully more two-sided, growth-and-upside-oriented research process than fixed-income credit work.

Where the two genuinely converge: multi-asset and balanced mandates

Some real mandates — a classic balanced fund (a mix of stocks and bonds, following logic connected to Finance 101's correlation-regimes deep dive) or a full multi-asset strategy spanning equities, fixed income, and sometimes commodities or alternatives — require both skill sets working together, with a genuine, ongoing asset allocation decision (how much in each asset class right now) layered on top of the security-selection decisions within each. This is a real, distinct discipline of its own, blending both worlds rather than picking one.