The Weight of a Single Ticker
Elizabeth's portfolio looks like a bet, not a retirement plan.
When a financial planner first charted her asset allocation, the pie chart was almost comically lopsided: one enormous green wedge labeled PharmaCorp, and tiny slivers for everything else. Her 401(k) rollover held $300,000. A savings account contributed $140,000. But the $1.5 million in stock dwarfed everything, representing 72% of her investable net worth.
Concentration risk is one of the most common — and most overlooked — threats facing retirees who spent careers at publicly traded companies. Academic research suggests that a single-stock position exceeding 10-15% introduces uncompensated risk: volatility that the market doesn't reward you for bearing. Elizabeth's position is nearly five times that threshold.
Elizabeth watched PharmaCorp's stock price triple during the 2010s as her oncology division produced two blockbuster drugs. She weathered a 40% drawdown during the pandemic and held firm. That resilience felt like wisdom at the time. In retirement, with no paycheck to replenish losses, the same stubbornness carries a different kind of cost.
72%
PharmaCorp Allocation
Recommended single-stock max: 10-15%
$120K
Cost Basis
On a position worth $1.5M — 92% unrealized gain
2.1%
Dividend Yield
$31,500/year — but not guaranteed
The Reality Check
A single FDA rejection letter could erase $500,000 or more from Elizabeth's net worth in a single trading session.