{
  "slug": "merger-arbitrage",
  "name": "Merger Arbitrage",
  "aliases": [
    "Risk Arbitrage",
    "M&A Arb"
  ],
  "category": "event-driven",
  "parent_strategy": "event-driven",
  "description": "An event-driven strategy that captures the spread between an announced acquisition price and the current market price of the target, profiting if the deal closes and absorbing the loss if it breaks.",
  "investment_thesis": "Announced deals trade at a discount to the offer price reflecting deal-completion risk, time value, and financing risk. A diversified book of well-screened deals earns a relatively stable insurance-like premium.",
  "edge_source": "Legal and antitrust analysis, deal mechanics, regulatory expertise, and disciplined sizing of break-risk.",
  "typical_holding_period": "1-9 months",
  "typical_leverage": {
    "min": 1,
    "max": 3,
    "typical": 1.5
  },
  "expected_volatility": {
    "min": 4,
    "max": 8,
    "unit": "annualized-pct"
  },
  "expected_sharpe": {
    "low": 0.5,
    "high": 1.5
  },
  "drawdown_profile": "Negative-skew; long stretches of grinding gains punctuated by occasional sharp losses on broken deals.",
  "correlation_to_equities": 0.3,
  "correlation_to_bonds": 0.05,
  "liquidity_profile": "monthly",
  "instruments_used": [
    "common stock",
    "options",
    "credit",
    "preferred shares"
  ],
  "asset_classes": [
    "equities",
    "credit"
  ],
  "primary_risks": [
    "deal-break risk",
    "antitrust intervention",
    "financing risk",
    "shareholder vote",
    "FX (cross-border deals)"
  ],
  "macro_regime_sensitivity": {
    "rising_rates": "Tighter financing increases break risk",
    "falling_rates": "Easier financing supports deal flow",
    "high_volatility": "Spreads widen; selective opportunity",
    "low_volatility": "Spreads compress; lower returns",
    "recession": "Deal flow drops; risk of pulled deals",
    "bull_market": "Strong deal flow; tight spreads"
  },
  "fee_structure": {
    "management_fee": "1.0%-2.0%",
    "performance_fee": "15%-20%",
    "high_water_mark": true
  },
  "key_metrics": [
    "deal close rate",
    "annualized spread",
    "loss-given-break",
    "deal concentration"
  ],
  "notable_practitioners": [
    "Ivan Boesky (historical)",
    "John Paulson",
    "Daniel Loeb (Third Point)",
    "Pentwater"
  ],
  "exemplar_funds": [
    "pentwater",
    "merrill-lynch-arb-historic"
  ],
  "related_terms": [
    "arbitrage",
    "event-driven",
    "antitrust",
    "tender-offer"
  ],
  "related_strategies": [
    "event-driven",
    "special-situations",
    "convertible-arbitrage"
  ],
  "historical_drawdowns": [
    {
      "year": 2008,
      "event": "Microsoft/Yahoo and credit-crisis broken deals",
      "estimated_drawdown_pct": -12
    },
    {
      "year": 2022,
      "event": "Twitter/Musk arc and antitrust scrutiny",
      "estimated_drawdown_pct": -5
    }
  ],
  "academic_foundations": [
    "Mitchell & Pulvino (2001) — Characteristics of Risk and Return in Risk Arbitrage"
  ]
}