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Professional · Lesson 4 of 4

Systematic strategies used by professionals

8 minute read · By Krishna Avadhani, Vestora Academy · Updated 18 October 2026

Trend following (time-series momentum) goes long assets in uptrends and short those in downtrends across many futures markets. Pairs trading (statistical arbitrage) buys one stock and shorts a related one when their usual price relationship stretches.

Risk parity allocates so each asset class contributes equal risk, usually leveraging bonds. Volatility targeting scales exposure down when volatility rises. Carry strategies earn the yield difference across currencies, bonds or commodities.

All of these can fail suddenly when crowded: the August 2007 "quant quake" saw many statistical-arbitrage funds suffer large losses in days as they sold the same positions at once.

Key takeaways

  • Trend, stat-arb, risk parity, vol targeting and carry are core quant styles.
  • Leverage and crowding create sudden losses.
  • The 2007 quant quake is the classic warning.

Check your understanding

1. Pairs trading profits when...

  • Both shares crash
  • A stretched price relationship returns to normal
  • Volatility is zero
  • Dividends rise
Show the answer

A stretched price relationship returns to normal. It bets on mean reversion of the spread.

2. What caused the August 2007 "quant quake"?

  • A new tax
  • Many funds unwinding similar positions at once
  • A data outage
  • A currency peg
Show the answer

Many funds unwinding similar positions at once. Crowded trades unwound together.

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General education only, not financial advice. Examples are illustrations. Rules, tax settings and products change; check official sources.