The Short Answer
Guardant Health stock (GH) is generally considered halal for Muslim investors, subject to the balance-sheet ratios. Guardant Health is a precision-oncology company whose blood-based (liquid-biopsy) tests help detect and monitor cancer and guide treatment, including its Guardant360 and Shield screening products. Developing and selling diagnostic tests that benefit human health is a permissible activity, so the business-activity screen passes.
Like many growth-stage diagnostics companies, Guardant runs an operating loss funded partly by convertible notes while holding a large cash and investments balance. Confirm the total-debt-to-market-cap ratio against the 33% threshold using the latest filings, and purify the interest income on cash.
Sharia Screening Methodology
Islamic scholars use several criteria to screen stocks:
- Business activity screen: Is the company's primary business halal?
- Debt ratio: Total debt / market cap must be under 33%
- Interest income: Interest income / total revenue must be under 5%
- Haram revenue: Revenue from haram sources must be under 5%
- Receivables ratio: Total receivables / total assets must be under 49–70% (varies by board)
What Guardant Health Does
Guardant Health, Inc. (headquartered in Palo Alto, California) is a precision-oncology company:
- Therapy selection: Guardant360 liquid-biopsy tests to guide cancer treatment.
- Monitoring: Tests to track disease and recurrence.
- Screening: Shield, a blood-based colorectal-cancer screening test.
Developing and selling diagnostic tests that benefit human health is a permissible activity, so the business-activity screen passes.
Why It Passes (and What to Check)
1. Permissible Core Business
Guardant's revenue comes from cancer diagnostics — a clearly permissible activity that benefits human health. There is no haram revenue line.
2. Debt Ratio (Deciding Screen)
Guardant has used convertible notes to fund growth, so confirm the total-debt-to-market-cap ratio against the 33% threshold using the latest filings. This is the deciding screen for the verdict.
3. Interest Income (Purify)
Guardant earns interest income on its large cash and marketable-securities balance. This should be checked against the 5% threshold and the corresponding portion of returns purified.
Financial Ratios
Based on Guardant's most recent financial statements:
- Total Debt / Market Cap: Convertible notes — confirm against filings ⚠️ (threshold: under 33%)
- Interest Income: On a large cash balance — check and purify ⚠️ (threshold: under 5%)
- Haram Revenue: None ✅ (threshold: under 5%)
- Receivables Ratio: Confirm against filings ⚠️ (threshold: 49–70%, varies by board)
Assuming the ratios hold, GH screens as halal — it is an unprofitable, high-multiple growth stock whose capital structure can change, so re-screen periodically.
What About Purification?
Purify the portion of returns attributable to interest income earned on Guardant's cash and marketable-securities balance — donating that share of gains to charity.
Verdict from Major Screening Agencies
Guardant Health stock is generally screened as halal by:
- Zoya App — Compliant subject to ratios ✅
- MSCI Islamic criteria — Compliant subject to debt ratio ✅
- Most major Sharia advisory boards — Halal with routine purification ✅
Bottom Line
Guardant Health (GH) is generally halal for Muslim investors, subject to the balance-sheet ratios. The cancer-diagnostics business is clearly permissible. Confirm the debt and receivables ratios against the latest filings — the convertible notes make the debt screen the deciding one — purify the interest income, and re-screen periodically.
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