Seagate Technology PLC

Dependability is the through-line here. November stands out, higher in all 10 Novembers, but it heads a clutch of months that pull the year reliably upward.

The headline flatters a touch — its +8.1% average sits well above the +4.3% a typical year delivers, the work of a few big Novembers. It is also the calendar's calmest month, its returns swinging least from year to year (a 6.9% spread), and even its worst November in 10 years lost only 0.3% — the gentlest downside anywhere on its calendar. Crucially, the gain is the stock's own rather than a rising tide's: November has cleared the S&P 500 by +5.8 points above the index. That consistency sets it apart from the field, where the average stock manages November only about 62% of the time.

The strength clusters rather than stands alone — November–February forms a firm stretch that carries much of the year. At the other end of the calendar, April has been the soft spot — the weakest of 3 months that average a loss (−3.7%), and the edge isn't year-round — the stock has trailed the S&P 500 in April, October, and March. Its roughest month on record was a −35.4% April in 2016 — a reminder of how hard even a seasonal name can fall.

November has now closed higher 10 years running. Reassuringly, the tendency has held its shape: the recent five years still track the years behind them.

The takeaway is less about when to buy than what to expect: November aside, the stock's months offer little reliable tilt.