Property Flip Pattern Screen

Flag adjacent property transfers that meet caller-defined holding-period and price-gain thresholds.

Description

A property-flip pattern screen examines adjacent recorded sales for short holding periods and sufficient price gain.

A property-flip pattern screen examines adjacent recorded sales for short holding periods and sufficient price gain. Sorting establishes the chronology first.1

Flag adjacent property transfers that meet caller-defined holding-period and price-gain thresholds.

When to use Property Flip Pattern Screen

Use this tool to flag adjacent property transfers that meet caller-defined holding-period and price-gain thresholds.

Prepare the text, recorded observations, aligned figures or editorial criteria requested. Confirm what each label, count, timestamp or supplied flag represents before interpreting the result.

How to use Property Flip Pattern Screen and understand its results

  1. Prepare the text, recorded observations, aligned figures or editorial criteria requested. Confirm what each label, count, timestamp or supplied flag represents before interpreting the result.
  2. Enter transferDates, salePrices, maximumHoldingDays, minimumGainPercent using the field table and calculation rules, then run the tool.
  3. Read candidatePairs, candidateCount, largestGainPercent. The explanation below defines the units, signs, ordering and any flags or placeholder values.
  4. If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
Input fieldMeaningValue type; see rules belowRequirement
transferDatesTransfer dateslist of stringRequired
salePricesSale prices (currency)list of numberRequired
maximumHoldingDaysMaximum holding period (days)integer; minimum: 0Required
minimumGainPercentMinimum price gain (%)numberRequired

Enter at least two aligned parseable UTC date strings and positive prices, a nonnegative integer day maximum and finite minimum gain. Sort sales by date; inspect adjacent pairs only. Return original-index arrows, pair count and largest adjacent gain. Same-day sales have zero holding days.

gain%=100(nextPrice/priorPrice−1); flag=days≤maximum AND gain≥minimum

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output fieldMeaningValue type
candidatePairsCandidate transfer pairslist of string
candidateCountCandidate countinteger; minimum: 0
largestGainPercentLargest adjacent gain (%)number
json
{
  "input": {
    "transferDates": [
      "2024-01-01",
      "2024-05-01",
      "2025-01-01"
    ],
    "salePrices": [
      100000,
      140000,
      145000
    ],
    "maximumHoldingDays": 180,
    "minimumGainPercent": 25
  },
  "output": {
    "candidatePairs": [
      "0->1"
    ],
    "candidateCount": 1,
    "largestGainPercent": 39.99999999999999
  }
}

Limitations and assumptions

The largest gain can be negative. Native dates may normalize. No property identity, ownership relationship, fraud or transaction authenticity is assessed.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Document Entity Date Sorter: Parse compact document records, sort them by dateline, and collect unique named entities. For a complementary task, use Takedown Decision Score: Score supplied takedown factors and recommend an editorial action.

References

  1. Property Flip Pattern Screen — tool.io

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