Here are the 2 big things we're watching in the stock market in the week ahead

The S&P 500 is up nearly 17% YTD and poised for a third straight year of gains as markets head into the Fed's December meeting where a quarter-point cut is priced in and the summary of economic projections will be closely watched amid inflation still above 2% and a weakening labor market. Earnings catalysts this week include Broadcom, where street estimates (LSEG) expect fiscal Q4 EPS of $1.86 (+31% YoY) and revenue of $17.49bn (+17.5%) with investor focus on custom AI chip demand and networking sales, and Costco, where fiscal Q1 EPS is seen at $4.28 (+5.8%) on $67.17bn revenue (+8%), with management commentary on tariffs, foot traffic and basket trends under scrutiny. Broad sector data from FactSet shows 83% of S&P companies beat EPS and 76% beat revenue, led by tech and industrials, but Fed policy uncertainty and tariff litigation pose downside risks for 2026 guidance.

Analysis

Market structure: A 25bp cut priced for Wednesday favors growth and AI-capex beneficiaries (Broadcom/AVGO, GOOGL) and should compress front-end yields; expect a 3–5% near-term re-rating for high-quality AI infrastructure names if guidance confirms secular spend. Retail membership models (COST) are defensive but sensitive to basket-size weakness and tariff noise; a soft Black Friday/Cyber Week read could compress Costco EPS by 3–8% off consensus for Q1. Networking and interconnect suppliers gain pricing power as hyperscalers shift to rack-scale AI architectures, tightening demand for specialised ASICs/TPUs and high-speed optics through 2026.

Risk assessment: Tail risks include a surprise hold/no-cut or a more dovish Fed-chair pick that spooks front-end markets — either could swing 10–15% intraday in sector leaders. Short-term (days) drivers are Fed dot plot dissents and Powell comments; medium-term (weeks–months) risks are 2026 guidance from Broadcom/Costco and incoming CPI/ payroll data; long-term (quarters) hinge on sustained enterprise AI capex and TPU adoption rates. Hidden dependency: Broadcom’s upside is lumpy and tied to a few hyperscaler contracts (Google TPU/TPU7 adoption); a single large contract slowdown would meaningfully hit revenue recognition.

Trade implications: Size asymmetric exposure — prefer option-defined longs into earnings and the Fed: buy AVGO call spreads or calendars rather than naked stock (target 1–3% portfolio exposure pre-earnings with 2–4% OTM puts as limit-loss). For COST take a 1–2% long position post-earnings only if management keeps SS comp guidance within ±1% of consensus and tariff litigation commentary isn’t adverse; otherwise sell into any >3% pop. Rate move play: if 2s10s steepens >10bp post-cut, rotate 3–5% from financials into long-duration tech (GOOGL) within 1 week.

Contrarian angles: Consensus assumes a smooth 25bp cut and steady 2026 growth; that underweights a no-cut surprise or a Powell successor who leans hawkish — markets are complacent (implied S&P drawdown protection priced low). Broadcom’s networking franchise may be underpriced vs. AI upside; Costco’s membership moat is underappreciated if basket mix stabilises. Historical parallel: 2019 pre-cut rally reversed when services inflation re-accelerated — set strict stop-losses and trade size accordingly.

Key Decisions for Investors

• Consider establishing a 1–3% pre-earnings position in AVGO using option-defined risk: buy a 45–75 day call spread (debit) sized to 1–2% equity-equivalent and buy a 2–4% OTM put (protective) to cap downside; trim or close on a >10% gap-up post-earnings.
• Delay building >1% long in COST until after earnings; if management maintains SS comp guidance within ±1% of consensus and tariff commentary is neutral, initiate a 1–2% long position and add to 3% on a pullback >5% within 4 weeks.
• If the Fed delivers the expected 25bp cut and 2s10s steepens >10bp within 48 hours, rotate 3–5% from cyclicals/financials into AI infrastructure names (GOOGL, AVGO) over the following 5 trading days; cut if yields reverse by >15bp.
• Implement a protection sleeve: buy a 30-day S&P 500 3–5% OTM put spread sized to 0.3–0.5% portfolio cost to hedge a Fed/earnings-driven downside (activate if Fed dissents >=3 or either Broadcom/Costco guide >5% below consensus).
• Execute a pair trade: go long AVGO (1.5% weight) versus short CSCO (1.0% weight) through end of Q1 2026 to express hyperscaler interconnect win-rate; unwind if AVGO guidance misses by >5% or CSCO rerates >8% on idiosyncratic news.