BofA warns: underestimating FOMO-driven equity upside risk is at your own risk

Overview

This is a BofA global equity volatility research note focused on the conflict between rising macro risks and FOMO in the equity market. The report notes that inflation concerns, rising long-end yields, and UK political uncertainty have already capped the pace of the U.S. equity rally, but during the bubble-formation phase, investors' fear of missing out may continue to support equities and the technology sector.

Core views

The report's core view is: first, macro risks have not disappeared, especially long-end rates, commodity volatility, and UK political risk; second, the equity market still shows strong resilience, and relatively flat call skew indicates that right-tail upside is still being valued; third, in an environment where both left-tail and right-tail risks coexist, options structures are more attractive than simple directional positions; fourth, Chinese AI hardware and U.S. technology remain important vehicles for the FOMO trade.

Analysis framework

The report combines BofA's GFSI cross-asset stress indicator, the BRI bubble-risk indicator, option-implied volatility and skew, correlation pricing, index constituent changes, and cross-asset political-risk scenarios to form a macro risk view and specific options trade expressions.

Methodology notes

• Cross-asset stressBofA GFSI

  Uses cross-asset volatility, spreads, and fund flows subcomponents to gauge market stress.

  The report shows GFSI at -0.11 on May 15, 2026, at the 33rd percentile since 2000, slightly higher than the prior week.

• Bubble riskBofA Bubble Risk Indicator

  A price-based 0-to-1 bubble-risk reading that combines returns, volatility, momentum, and fragility.

  1 represents extreme bubble-like price behavior, while 0 represents no bubble-like price behavior; the report says global equity BRI is rising, with tech and semiconductor-related themes standing out.

• Options strategyLimited-risk spreads and contingent option structures

  Express asymmetric risk-reward through put spreads, call spreads, dual digitals, and cross-asset contingent calls.

  The report emphasizes that when macro left-tail risk and FOMO right-tail risk coexist, options structures can cap losses while preserving scenario upside.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• TLT

  Long-end U.S. Treasury weakness hedge

  Strengths

  The TLT put spread offers limited-risk protection if yields continue to rise, and the report says the payoff multiple sits in an historically attractive range.

  Weaknesses

  If long-end yields fall back or bond prices stabilize, the structure may lose the premium paid.

  Comparison

  Compared with shorting bonds directly, the put spread has a clearer loss cap.

  Risks

  The main risk is loss of the premium paid.

• QQQ/NDX

  U.S. tech and AI upside expression

  Strengths

  FOMO, tech earnings, and potential large-cap tech IPOs may continue to support right-tail upside.

  Weaknesses

  NDX implied volatility is relatively high, making outright option buying expensive.

  Comparison

  The report prefers call spreads or NDX-GBPUSD contingent structures to lower cost.

  Risks

  If tech stocks pull back or the correlation assumption fails, the structure's gains are limited or the premium is lost.

• FTSE China A50 / XIN9I

  China AI hardware exposure

  Strengths

  IT weighting has risen rapidly, AI hardware companies have become an important driver of the index, and A50 volatility remains below many Asia AI-related assets.

  Weaknesses

  The index does not include Hong Kong-listed AI software giants such as Tencent and Alibaba, so the exposure is more hardware-focused.

  Comparison

  Compared with KWEB and Hang Seng Tech, the FTSE China A50 is more geared toward mainland China AI hardware and semiconductor chains.

  Risks

  If AI hardware trades become crowded or pull back, the call spread may lose the premium paid.

• SX7E/SX7P

  Political-risk expression for eurozone banks versus UK banks

  Strengths

  UK banks are more sensitive to domestic political, tax, and fiscal risks, so SX7E relative to SX7P may benefit.

  Weaknesses

  If UK political risk eases or UK banks outperform, the relative-value structure may perform poorly.

  Comparison

  The report says the SX7E/SX7P volatility ratio is at a low level, making a bullish SX7E structure cheaper.

  Risks

  The call switch may lose money if the short leg performs better than the long leg.

• GBP/USD and EUR/GBP

  FX expression of UK political and fiscal risk

  Strengths

  Sterling is usually a barometer of UK political and fiscal instability, and a weaker GBP can help reduce the cost of some equity upside structures.

  Weaknesses

  If sterling rebounds or correlation pricing normalizes, the contingent structure may not trigger.

  Comparison

  Compared with simply going long European or U.S. equities, combining equity upside with a weaker pound can improve scenario payoff multiples or reduce option cost.

  Risks

  The FX-equity linkage assumption may fail.

Key data

• GFSI latest reading-0.11On May 15, 2026, slightly up from -0.13 on May 8, 2026.
• GFSI historical percentile33rd percentileBased on the historical sample since 2000.
• GFSI risk allocator7.3% overweightDown from 14.6% overweight the prior week; Bullish, Bearish, and Neutral shares were 22.0%, 14.6%, and 63.4%, respectively.
• U.S. 30-year yield>5.1%Long-end yields rose after hot CPI/PPI prints and UK fiscal-political disruptions.
• NVDA earnings implied volatilityabout 5.7%The report sees it as a potential catalyst for continued upside asymmetry.
• TLT put spread7.8x maximum returnBuy TLT Jun 82-78 put spread, indicative price 51c, reference price 83.65.
• XIN9I call spread7.1x maximum returnBuy a 3-month 105%-115% call spread, cost 1.40%, with loss limited to premium paid.
• FTSE China A50 IT weightingabout 25.3%About 7.7% a year ago, approaching and possibly exceeding the financials sector's roughly 26.9%.
• China A50 recent rally contribution96% from the top five IT namesIncluding Zhongji Innolight, Cambricon, Hygon, Eoptolink, and Foxconn.
• SX5E/EURGBP dual digital13x maximum returnUsed to express a UK-specific risk scenario in which European equities rise while EUR/GBP rises.

Impact & implications

The implication for investors is that one should not underestimate the stock-market upside tail risk simply because macro pressure is rising; a more suitable approach is to use options structures to simultaneously cover deteriorating long-end rates, UK political risk, U.S. tech FOMO, and China AI hardware exposure while controlling premium loss.

Risks

• Further increases in inflation and long-end yields could pressure risk asset valuations.
• UK political uncertainty could push up gilt yields, macro volatility, and weigh on sterling.
• If AI and tech-related assets experience a crowded-trade reversal, the right-tail option structures could lose the premium paid.
• Options structures have expiry constraints; if the scenario occurs after expiration, the strategy may not profit.
• Contingent calls and dual digitals depend on cross-asset correlation and trigger conditions, and actual results may differ from pricing assumptions.
• The trades listed in the report are not suitable for all investors and may involve significant risk.

What to watch

• U.S. inflation data, long-end Treasury yields, and the 30-year yield trend.
• VIX, equity call/put skew, and changes in TLT put skew.
• NVDA earnings and progress in large U.S. tech IPOs.
• Changes in high-bubble-risk assets such as tech, semiconductors, Nikkei, and Kospi within BofA BRI.
• UK leadership uncertainty, fiscal-policy messaging, gilt yields, and GBP/USD trends.
• IT weighting in the FTSE China A50, performance of AI hardware leaders, and XIN9I volatility.