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Tom Preston Says Delta Alone Won't Tell You the Better Trade

NowPress play to follow along0:00 / 15:02
Chapters7 segments · tap to seek
ticker lesson

Breakdown

0:00lesson

Delta as probability proxy for options

  • Delta used as proxy for probability of expiring worthless
  • Delta 40 strike or 35 delta strike considered
  • Delta 16 delta option generates less credit
  • Delta 25 delta option has higher probability of profit
2:16lesson

Probability of in the money vs out of the money

  • 700 put has 17% probability of being in the money
  • 725 put has 25% probability of being in the money
  • Probability of out of the money is 83% vs 75%
  • Volatility must be considered before choosing delta
4:45lesson

Volatility and normal distribution impact

  • Normal distribution assumed for stock returns
  • 15% volatility leads to narrower distribution
  • 30% volatility leads to flatter distribution
  • Higher volatility pushes deltas further out of the money
7:44lesson

Volatility impact on put pricing

  • 16 delta put at 15% volatility is 850 strike
  • 25 delta put at 15% volatility is 900 strike
  • 16 delta put at 30% volatility is 700 strike
  • 25 delta put at 30% volatility is 800 strike
10:23lesson

Volatility and credit collection

  • Low volatility leads to less credit when selling puts
  • Higher volatility leads to more credit when selling puts
  • 16 delta put at 15% volatility is worth 4 cents
  • 25 delta put at 15% volatility is worth 69 cents
12:34lesson

Risk and reward trade-off with delta

  • Both 16 delta and 25 delta puts lose money if stock drops
  • 25 delta put gives more credit for risk
  • Traders must decide if reduced credit is worth the trade
  • Volatility and strike price impact credit and risk
14:40lesson

Delta and volatility theory summary

  • Delta quantifies trade decision-making
  • Volatility affects strike price and credit
  • Traders must assess probability and credit
  • No trade recommendation given

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