BofA: U.S. Large-Cap Earnings Options Are Underpriced, European Ones Are Overpriced
nashnova research
Bank of America's latest report finds that actual earnings-day moves for large U.S. stocks far exceed what options price in, while European investors are overpaying for volatility that never arrives — the two markets are mispriced in opposite directions.
What is the "idiosyncratic risk era"?
Index-level volatility looks calm, but single-stock swings are extreme — BofA calls this the "idiosyncratic risk era."
Three-month at-the-money vol for the SPX Top 50 sits at 38%, roughly 2.5× the index level; Euro Stoxx 50 constituents come in at 31%, about 1.8× the index.
This means → watching the index alone badly understates how much individual stocks actually move — a blind spot that hits hardest in single-stock options.
How much are U.S. earnings options underpricing?
BofA compares the "excess implied vol" priced before each earnings date with the realized vol afterward: implied premium sits at the 85th historical percentile, but realized premium is at the 91st — options are systematically cheap.
Cap-weighted, the gap widens further: realized earnings vol is at the 100th percentile (the highest on record), while implied vol is only at the 77th. In plain terms = the bigger the company, the worse the mispricing.
More than half of SPX Top 50 names (by count) and over two-thirds (by market cap) saw earnings-day moves exceed what options predicted; the cap-weighted reading is at the 98th percentile.
What signal did the "Magnificent Seven" send?
In August, BofA flagged that all six Mag-7 names that had reported moved far more than options implied — the first time that happened in the ChatGPT era.
This means → even the most liquid, most closely watched mega-cap tech names had their earnings risk underpriced by the options market.
Three months later, the options market still has not corrected. This reflects a structural gap the market has yet to digest, not a one-off surprise.
Why is Europe's problem the exact opposite?
Euro Stoxx 50 earnings implied premium (equal-weight) has climbed to the 94th historical percentile, yet realized premium sits at just the 78th — investors paid up, but the volatility never showed.
Cap-weighted, the picture is the same: implied vol at the 94th percentile, realized vol at only the 72nd.
Even after normalizing for overall vol levels, the share of total variance attributable to earnings risk still sits at the 74th percentile. In plain terms = the high premium is not because the market is broadly more fearful — investors are specifically overpaying for earnings-day risk.
Are European investors getting their money's worth?
Only about one-third of Euro Stoxx 50 constituents recently saw earnings-day moves exceed what options priced in — the 33rd percentile by both count and market cap.
BofA's summary: investors "paid an unusually high premium for European earnings risk without receiving commensurately large realized moves."
This means → if you are buying European earnings straddles to go long volatility, you are most likely overpaying.
What does this mean for investors?
BofA's regional conclusion is clear: U.S. single-stock earnings options — especially on mega-caps — still offer value, because the market continues to systematically underprice actual moves.
Conversely, European earnings vol looks expensive, and buyers should be more selective.
Whether the coming earnings season finally forces the U.S. options market to reprice will be the key test of this thesis.
市场有风险，内容仅供研究参考，不构成投资建议。