What did Duan Yongping actually do?

A source-backed history of material decisions from H&H International Investment. We preserve the sequence and observed outcomes instead of compressing judgment into a guru grade.

Material decisions: 37
Stocks observed: 10
Outcomes observed: 37

Each outcome preserves the stock’s post-disclosure excess return over the fixed observation window. The evidence stays decision-level; it is not rolled into a manager score.

Observed decisions and outcomes

Q2 2026
filed Aug 14, 2026
45d lag
NVDATRIM-54.6%
Duan Yongping · 12.1% of reported portfolio
Original SEC filing ↗
+4.2% vs SPY
34 sessions after disclosure
direction not supported so far
Q2 2026
filed Aug 14, 2026
45d lag
PDDADD+26.7%
Duan Yongping · 10.0% of reported portfolio
Original SEC filing ↗
-13.2% vs SPY
34 sessions after disclosure
direction not supported so far
Q2 2026
filed Aug 14, 2026
45d lag
GOOGTRIM-46.9%
Duan Yongping · 5.3% of reported portfolio
Original SEC filing ↗
-0.1% vs SPY
34 sessions after disclosure
direction supported so far
Q2 2026
filed Aug 14, 2026
45d lag
MSFTTRIM-25.8%
Duan Yongping · 1.9% of reported portfolio
Original SEC filing ↗
+8.1% vs SPY
34 sessions after disclosure
direction not supported so far
Q2 2026
filed Aug 14, 2026
45d lag
UNHTRIM-33.6%
Duan Yongping · 0.8% of reported portfolio
Original SEC filing ↗
-5.3% vs SPY
34 sessions after disclosure
direction supported so far
Q1 2026
filed May 19, 2026
49d lag
BRK/BADD+27.5%
Duan Yongping · 21.9% of reported portfolio
Original SEC filing ↗
-0.1% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2026
filed May 19, 2026
49d lag
NVDAADD+91.3%
Duan Yongping · 12.1% of reported portfolio
Original SEC filing ↗
-6.5% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2026
filed May 19, 2026
49d lag
PDDADD+71.2%
Duan Yongping · 10.1% of reported portfolio
Original SEC filing ↗
-12.1% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2026
filed May 19, 2026
49d lag
GOOGADD+99.7%
Duan Yongping · 5.3% of reported portfolio
Original SEC filing ↗
-15.2% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2026
filed May 19, 2026
49d lag
BABAEXITEXIT
Duan Yongping · 2.1% of reported portfolio
Original SEC filing ↗
-7.3% vs SPY
63 sessions after disclosure
direction supported so far
Q1 2026
filed May 19, 2026
49d lag
TSMTRIM-87.7%
Duan Yongping · 2.1% of reported portfolio
Original SEC filing ↗
-1.2% vs SPY
63 sessions after disclosure
direction supported so far
Q1 2026
filed May 19, 2026
49d lag
UNHNEWNEW
Duan Yongping · 0.8% of reported portfolio
Original SEC filing ↗
-2.0% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2026
filed May 19, 2026
49d lag
DISADD+112.3%
Duan Yongping · 0.7% of reported portfolio
Original SEC filing ↗
-0.5% vs SPY
63 sessions after disclosure
direction not supported so far
Q4 2025
filed Feb 17, 2026
48d lag
BRK/BADD+38.2%
Duan Yongping · 20.6% of reported portfolio
Original SEC filing ↗
-10.1% vs SPY
63 sessions after disclosure
direction not supported so far
Q4 2025
filed Feb 17, 2026
48d lag
PDDADD+34.5%
Duan Yongping · 7.5% of reported portfolio
Original SEC filing ↗
-15.7% vs SPY
63 sessions after disclosure
direction not supported so far
Q4 2025
filed Feb 17, 2026
48d lag
NVDAADD+1110.6%
Duan Yongping · 7.7% of reported portfolio
Original SEC filing ↗
+10.3% vs SPY
63 sessions after disclosure
direction supported so far
Q4 2025
filed Feb 17, 2026
48d lag
MSFTADD+207.7%
Duan Yongping · 2.4% of reported portfolio
Original SEC filing ↗
-1.7% vs SPY
63 sessions after disclosure
direction not supported so far
Q4 2025
filed Feb 17, 2026
48d lag
TSMADD+370.9%
Duan Yongping · 2.1% of reported portfolio
Original SEC filing ↗
+1.7% vs SPY
63 sessions after disclosure
direction supported so far
Q3 2025
filed Nov 14, 2025
45d lag
BRK/BADD+53.5%
Duan Yongping · 17.8% of reported portfolio
Original SEC filing ↗
-4.2% vs SPY
63 sessions after disclosure
direction not supported so far
Q3 2025
filed Nov 14, 2025
45d lag
BABATRIM-25.9%
Duan Yongping · 3.7% of reported portfolio
Original SEC filing ↗
-4.6% vs SPY
63 sessions after disclosure
direction supported so far
Q3 2025
filed Nov 14, 2025
45d lag
NVDATRIM-38.0%
Duan Yongping · 1.3% of reported portfolio
Original SEC filing ↗
-2.7% vs SPY
63 sessions after disclosure
direction supported so far
Q2 2025
filed Aug 14, 2025
45d lag
GOOGADD+75.2%
Duan Yongping · 3.0% of reported portfolio
Original SEC filing ↗
+33.9% vs SPY
63 sessions after disclosure
direction supported so far
Q2 2025
filed Aug 14, 2025
45d lag
NVDAADD+49.6%
Duan Yongping · 1.3% of reported portfolio
Original SEC filing ↗
+0.9% vs SPY
63 sessions after disclosure
direction supported so far
Q1 2025
filed May 15, 2025
45d lag
AAPLNEWNEW
Duan Yongping · 63.3% of reported portfolio
Original SEC filing ↗
+1.1% vs SPY
63 sessions after disclosure
direction supported so far
Q1 2025
filed May 15, 2025
45d lag
BRK/BNEWNEW
Duan Yongping · 15.0% of reported portfolio
Original SEC filing ↗
-15.8% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2025
filed May 15, 2025
45d lag
PDDNEWNEW
Duan Yongping · 7.6% of reported portfolio
Original SEC filing ↗
-7.5% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2025
filed May 15, 2025
45d lag
BABANEWNEW
Duan Yongping · 4.4% of reported portfolio
Original SEC filing ↗
-8.7% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2025
filed May 15, 2025
45d lag
GOOGNEWNEW
Duan Yongping · 1.4% of reported portfolio
Original SEC filing ↗
+13.9% vs SPY
63 sessions after disclosure
direction supported so far
Q1 2025
filed May 15, 2025
45d lag
MSFTNEWNEW
Duan Yongping · 0.9% of reported portfolio
Original SEC filing ↗
+5.9% vs SPY
63 sessions after disclosure
direction supported so far
Q1 2025
filed May 15, 2025
45d lag
DISNEWNEW
Duan Yongping · 0.6% of reported portfolio
Original SEC filing ↗
-6.4% vs SPY
63 sessions after disclosure
direction not supported so far
Q1 2025
filed May 15, 2025
45d lag
NVDANEWNEW
Duan Yongping · 0.6% of reported portfolio
Original SEC filing ↗
+24.7% vs SPY
63 sessions after disclosure
direction supported so far
Q4 2024
filed Feb 14, 2025
45d lag
AAPLEXITEXIT
Duan Yongping · 74.3% of reported portfolio
Original SEC filing ↗
-10.9% vs SPY
63 sessions after disclosure
direction supported so far
Q4 2024
filed Feb 14, 2025
45d lag
BRK/BEXITEXIT
Duan Yongping · 10.5% of reported portfolio
Original SEC filing ↗
+9.1% vs SPY
63 sessions after disclosure
direction not supported so far
Q4 2024
filed Feb 14, 2025
45d lag
GOOGEXITEXIT
Duan Yongping · 5.1% of reported portfolio
Original SEC filing ↗
-7.3% vs SPY
63 sessions after disclosure
direction supported so far
Q4 2024
filed Feb 14, 2025
45d lag
BABAEXITEXIT
Duan Yongping · 3.5% of reported portfolio
Original SEC filing ↗
-0.2% vs SPY
63 sessions after disclosure
direction supported so far
Q4 2024
filed Feb 14, 2025
45d lag
PDDEXITEXIT
Duan Yongping · 3.2% of reported portfolio
Original SEC filing ↗
-5.9% vs SPY
63 sessions after disclosure
direction supported so far
Q3 2024
filed Nov 14, 2024
45d lag
PDDADD+3693.8%
Duan Yongping · 3.2% of reported portfolio
Original SEC filing ↗
+4.2% vs SPY
63 sessions after disclosure
direction supported so far

Latticework Follow

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The evidence is limited to selected widely owned U.S.-listed securities in Form 13F filings. Filing dates can trail quarter end by up to 45 days in the normal reporting cycle, and the filings do not disclose transaction dates, prices, or intent.