Risk Management and Hedging

The textbook puzzle

Most introductory finance says investors diversify away firm-specific risk on their own. So why would a firm hedge? Each shareholder can hedge their exposure individually if they want.

The puzzle is real. In a frictionless MM world, hedging adds no value. Firms hedge anyway because four real-world frictions make hedging valuable at the firm level.

Four motives for corporate hedging

1. Reducing expected taxes (tax convexity). Most tax codes are convex — taxes paid rise more than proportionally with income. Smoothing income via hedging reduces lifetime tax bills. If unhedged earnings would swing between $0 (no tax) and $200M (taxed at 25%), the average tax bill is $25M. Hedged earnings of $100M every year are taxed at $25M too — but real tax functions have NOLs, AMT, and other complications that make smoothing worthwhile.

2. Avoiding financial distress. A firm levered to where a 30% revenue drop could trigger covenant breaches has strong reason to hedge against that drop. The expected cost of distress (from Unit 5) is reduced.

3. Investment-policy stability. Firms with valuable internal investment opportunities want to fund them without going to capital markets (which signal information, charge issuance costs). Hedging cash-flow volatility lets the firm always have internal cash for positive-NPV projects.

4. Managerial risk aversion. Managers’ wealth, careers, and human capital are concentrated in the firm. Even if shareholders are well-diversified, managers aren’t. Hedging reduces the personal risk managers bear, which (via agency costs) the firm pays for.

The hedging toolbox

Instrument	What it does	Cost	When best
Forward	Lock in a price for future delivery	None upfront; bilateral counterparty risk	Bespoke; one-off; relationship-banking
Futures	Standardized exchange-traded forward	Margin requirements; mark-to-market	Liquid commodities, FX, rates
Swap	Exchange one stream of payments for another (fixed-for-floating rates, FX, commodity)	Bilateral; cleared via ISDA	Multi-period exposures (interest rate, currency)
Option	Asymmetric payoff: right but not obligation	Premium paid upfront	When you want to preserve upside

Forwards vs futures: economically very similar; the distinction is plumbing (OTC vs exchange). Futures eliminate counterparty risk through daily margin; forwards retain it.

Swaps are typically multi-year exchanges of cash flows. An airline swapping floating-rate fuel costs for a fixed price for 3 years. A bank swapping fixed-rate mortgage receivables for floating-rate liabilities.

Options vs forwards: forwards lock in a price; options give you a floor (put) or ceiling (call) while keeping the upside. Options cost premium; forwards don’t. The choice depends on whether you’re willing to pay for asymmetric coverage.

A worked airline-hedging example

Southwest Airlines famously hedged jet-fuel prices via crude-oil swaps in the 2000s. Suppose:

• Annual jet-fuel consumption: 500M gallons.
• Current spot price: $2.00/gallon. Total annual cost: $1B.
• Volatility: prices could realistically range from $1.50 to $3.50 next year (i.e., -\250M$to$+$750M$ change in costs).

A 12-month forward at $2.00 locks in next year’s cost at $1B exactly. No upside (if oil drops to $1.50, the firm pays $2.00 anyway). No downside (if oil spikes to $3.50, the firm still pays $2.00).

An at-the-money call option (right to buy at $2.00) costs premium, say $0.10/gallon = $50M. Caps cost at $1.05B if oil spikes; preserves benefit if oil drops below $2.00.

Which is better? Depends on:

• The firm’s view on future oil prices.
• The cost of distress at very high oil prices.
• Whether shareholders want exposure to oil prices.

Southwest famously made money on its hedges in the 2007-2008 oil spike. They also gave back gains via hedges that locked them above spot in subsequent low-oil periods. Hedging is insurance, not speculation — the value comes from reducing distress risk, not from predicting price moves.

When hedging destroys value

Three patterns of bad hedging:

1. Speculation disguised as hedging. A trader takes large directional bets on commodity prices, justifies them internally as “hedges,” but they aren’t matched to real exposures. Hammer- smith’s losses ($1.5B in interest-rate swaps, 1990) are the textbook case.

2. Hedging a non-existent exposure. Buying jet-fuel futures when you don’t actually use that much fuel. The “hedge” becomes a directional bet.

3. Over-hedging away NPV. A hedge that costs more than the expected reduction in distress costs destroys value. Hedging premiums aren’t free.

The general rule: only hedge exposures that genuinely correspond to one of the four motives. Hedge them only to the extent that the hedging cost is less than the expected benefit.

What about Berkshire Hathaway?

Famously, Warren Buffett’s firm hedges very little. The reason is the inverse of our four motives: Berkshire has so much excess liquidity, low leverage, and tax-advantaged investment opportunities that none of the standard motives bite. For a typical operating firm with leverage and earnings sensitivity, those motives matter and hedging is usually worth doing.

What we covered in this course

This was the last lesson. Across six units and 28 lessons, FIN 3610 has built up the foundations a finance professional needs:

• Unit 1: how firms are structured and how to read them.
• Unit 2: the time value of money and fixed-income basics.
• Unit 3: valuing projects and firms.
• Unit 4: risk-adjusted discount rates.
• Unit 5: financing decisions and capital structure.
• Unit 6: options, real options, M&A, hedging.

From here, advanced courses cover derivatives in depth, fixed- income portfolio management, M&A practice, and corporate governance. The framework you’ve built — discount cash flows, do it carefully — applies to all of them.