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On October 26, 2026, Brazil’s benchmark Ibovespa stock index plunged by approximately 17% intraday following Luiz Inácio Lula da Silva’s victory in the presidential runoff. While the sell-off had several contributing factors, including the reversal of market bets, concerns about fiscal discipline, public debt, and investor expectations, it raises a broader question about the relationship between political ideology and financial markets.

Do stock markets tend to react negatively when right-wing governments lose power and governments with more progressive, socially oriented, or environmentally conscious agendas take office? Has this pattern occurred historically in other countries, or is Brazil an example of a market correcting positions built around an anticipated election outcome?

One question worth exploring is whether some investors and large corporations perceive policies prioritizing social welfare, environmental protection, and public investment over aggressive capital accumulation as less favorable to their financial interests.

Could Brazil’s market reaction partly reflect a clash between investors’ expectations and the economic priorities of the incoming administration? Or is the sell-off better explained by fiscal risks, uncertainty, and speculative positioning rather than ideology itself?

I would be interested in historical examples and evidence from other countries that could help distinguish between these explanations.

DECIDI USARLO EN MI NEGOCIO, POR AHORA PAUSARE MI PLAN DE INVERSION EN BOLSA, RETIRE 99% DE CHARLES SCHWAB

System Push Notificationin a precarious state

The Kospi's 18.8% plunge this month has erased about 1,101 trillion won (approximately $830.7 billion) from the market capitalization of South Korea's top 10 business groups, which fell from 4,472.5308 trillion won at the end of last month to 3,371.441 trillion won as of Oct. 23.

SK Group posted the steepest decline at 30.1%, as SK Hynix and SK Square tumbled on worries over the profitability of the AI value chain, while Samsung Group fell 24.3%, the largest loss in absolute terms at about 525 trillion won (approximately $396.1 billion).

The two groups accounted for 90% of the total decline. HD Hyundai and Hanwha each dropped around 20% on weakness in shipbuilding and defense stocks, but LG Group fell only 5.3% on gains in LG Energy Solution, and POSCO Group limited its decline to 6.4%.

Why Do Tech Stocks Crash So Suddenly?

Tech stocks can drop 20% in days. How do you tell a healthy pullback from a broken investment thesis?

I wrote a short article breaking down how I think about market sell-offs and what investors should focus on.

Free to read — no paywall.

En los mercados financieros, la verdadera ventaja competitiva no consiste en predecir el futuro con rotundidad, sino en detectar con disciplina cuándo están cambiando las probabilidades antes de que ese giro resulte evidente para el consenso.

La sacudida tecnológica de esta semana —con el Nasdaq cediendo un 2,60% y el Índice de Semiconductores de Filadelfia (SOX) desplomándose un 6,72%— nos deja una señal mucho más profunda que una simple corrección diaria.

Según el informe de Goldman Sachs Prime Brokerage, las tres grandes categorías de gestión alternativa (fundamental long/short, sistemáticas y multiestrategia) registraron simultáneamente pérdidas superiores al 1% en una sola sesión. Es la primera vez desde el estallido de la pandemia en 2020 que las tres familias de hedge funds sufren al unísono un quebranto diario de esa magnitud.

¿Qué está ocurriendo realmente bajo la superficie del mercado?

1️⃣ Concentración extrema (Crowding) y riesgo de desapalancamiento (De-grossing): Estrategias con metodologías teóricamente independientes han convergido durante meses en los mismos ganadores (semiconductores y megacaps de IA). Cuando se perforan los umbrales de volatilidad, se activan protocolos automáticos que obligan a recortar exposición bruta y neta.

2️⃣ La factura de la IA y el aviso de Meta (-7%): Pese a superar estimaciones en ingresos y beneficios, el mercado castigó la magnitud del CapEx comprometido. El problema aparece cuando el capital invertido escala más rápido que la rentabilidad incremental sobre el capital invertido (ROIC) en un entorno de financiación exigente.

3️⃣ Rotación vs. Distribución bajo sombra estanflacionaria: Mientras la tecnología sufría, el Dow Jones cerró plano y el Russell 2000 logró avanzar ligeramente. Sin embargo, con el petróleo escalando hacia los 113 dólares y los bonos actuando como refugio por temor al deterioro económico, la Reserva Federal queda atada de manos.

En mi nuevo análisis detallo las 4 señales críticas que definirán en las próximas semanas si estamos ante una purga táctica saludable o ante el inicio de una fase de distribución mayor.

¿Ven este movimiento como una oportunidad de rotación hacia sectores rezagados o como una alerta estructural sobre el apalancamiento en IA? Los leo en los comentarios.

📖 Artículo completo en Investing.com:

https://es.investing.com/analysis/la-tecnologia-cede-la-alerta-que-llega-desde-el-interior-de-los-hedge-funds-200485219

\#MercadosFinancieros #HedgeFunds #WallStreet #Inversiones #InteligenciaArtificial #Semiconductores #Macroeconomia #GestionDeRiesgo

Why Do Tech Stocks Crash So Suddenly?

Tech stocks can drop 20% in days. How do you tell a healthy pullback from a broken investment thesis?

I wrote a short article breaking down how I think about market sell-offs and what investors should focus on.

Free to read — no paywall.

SuperMicro was an early winner in the Ai boom. From a high PE of 80+ to 10 today. OUCH!!!
Feel sorry for whoever bought at the peak.

How much is your portfolio down in this bloodbath market?

Mine 12% 😭