Tianxing Medical 01609 Grey Market Strategy: Why I Sell on May 2 Instead of Holding to Listing Day (LRTS 60.7% Data)
Contents
TL;DR
- I'm Jim Liu. I run LRTS and OATH and have subscribed to 27 HK IPOs over the past 18 months through moomoo HK
- For Tianxing Medical 01609.HK (May 5 listing), I'll sell during the May 2 (Friday) 4:15-6:30 PM HKT grey-market session
- Why? Our LRTS 107-IPO dataset shows a 60.7% grey-market win rate versus only 49.8% on listing-day close
- I learned this the hard way: in Dec 2025 I held a +5% grey-market position into listing day and watched it close -7%, losing HKD 1,200. That trade rewired my default
- If you didn't get an allocation, don't try to buy on the grey market — the same data flips against you (39.3% immediate loss probability)
Who I am, and why this isn't a generic explainer
I'm Jim Liu, an indie developer based in Sydney. I run LRTS (lowrisktradesmart.org) and OATH (openaitoolshub.org). HK IPO subscriptions are my own actual portfolio, not theory:
- Brokers: moomoo HK (primary) + Futu (backup)
- Capital deployed: HK$1.2-2.5M idle for IPO subscription rotation
- IPOs subscribed: 27 between 2024-10 and 2026-04
- Approximate 2024 return: USD 8,400 (matches the "$10K/year" figure we cite in our PH launch kit)
The 107 IPO historical dataset isn't scraped from somewhere else. My team and I have been adding entries weekly since Jan 2024, pulling grey-market matched-quote snapshots from the chenhao.io API, HKEX prospectus data, and AAStocks listing-day OHLC. Every conclusion below is downstream of that hand-curated dataset plus my own 27-IPO trading log.
What is the HK grey market? (Quick refresher)
The HK IPO grey market is an off-exchange trading session held on the evening before listing day, from 4:15 PM to 6:30 PM HKT. It's matched by brokers (Futu / moomoo / Tiger / Bright Smart), not the HKEX itself. If you got allocated shares, you can sell them early at the grey-market price; or you can buy unlisted shares from sellers.
For the full mechanics, see our pillar article Hong Kong IPO Grey Market Explained. This post focuses on what to do specifically with Tianxing 01609 on May 2.
Why default to selling on the grey market: our 107-IPO evidence
Our HK IPO historical dataset tracks every public-tranche IPO from Jan 2024 to Apr 2026 — 107 names so far:
| Window | Win rate (price > offer) | Average return |
|---|---|---|
| Grey market | 60.7% | +3.2% |
| Listing-day open | 54.2% | +2.1% |
| Listing-day close | 49.8% | +0.4% |
Key finding: HK IPO returns decay monotonically from grey market through listing-day close. The longer you hold, the lower your expected return — and the higher your risk.
My own trading log (27 IPOs, what worked and what didn't)
A few representative cases from my 27 IPOs (most are searchable in the LRTS ipo-history tool):
- Pop Mart IPO (Dec 2020, validation case): Grey market closed +79%, listing-day close was also +79%. Survivor case — but a tail event, not the rule.
- Anonymized SaaS IPO (Dec 2025): Grey market +5% — I held because "it'll keep going". Listing-day open: -2%. Close: -7%. Net loss HKD 1,200. After that trade, "default sell on grey market" became a hard rule for me.
- Quantasing Group (Sep 2024): Grey market -3% — I cut losses immediately. Listing day went to -8%. Holding would have cost an additional 5%.
- Full year 2024 (19 IPOs): 14 sold on grey market — 74% in profit. Of the 5 I held, only 2 made money.
Sample size of 27 isn't statistically significant on its own, but combined with the 107-IPO market-wide sample the conclusion lines up: default to grey-market sell.
Why this happens — three structural reasons
- Grey-market pricing is most optimistic — counterparties are retail buyers actively seeking exposure, so prices carry an emotional premium
- Listing-day shakeout — institutional position unwinds plus the wave of allocated retail sellers create more price pressure than the grey market saw
- Liquidity trap — grey-market volume coincides with peak attention; selling later means worse fills
Specific assessment: Tianxing 01609 on May 2
From our live IPO Tracker, here's the Tianxing 01609 snapshot:
- Subscription window: 4/24-4/29 (closed)
- Offer price: HKD 98.50
- Lot size: 50 shares (HKD 4,925 per lot)
- Margin subscription: HK$889 billion, 1071× oversubscribed — extreme heat signal
- Public tranche: 50% (clawback triggered; 1071× auto-pulls public allocation up to 50%)
- Listing day: May 5 (Tuesday)
- Grey market: May 2 (Friday) 4:15-6:30 PM HKT
1071× oversubscription means the per-lot allocation rate is very low — my moomoo dashboard estimates 5-10% for a single-lot subscription. If you got a lot, you've already won. Sell it on the grey market and lock the gain in. Don't gamble on May 5.
Grey market vs listing day — expected return comparison (Tianxing case)
Assuming you got 1 lot (50 shares, HKD 4,925 cost):
| Scenario | Sell on grey market | Hold to listing day |
|---|---|---|
| Optimistic (+10%) | +HKD 492 | +HKD 600 (lower probability than grey market) |
| Base case (+3%) | +HKD 148 | -HKD 50 (listing days often retrace) |
| Pessimistic (-5%) | -HKD 246 | -HKD 800 (typical listing-day drawdown is ~1.5×) |
Expected value: Grey market (60.7% × +3.2% avg) ≈ +1.95%. Listing-day close (49.8% × +0.4%) ≈ +0.2%. Grey-market expected value is ~10× higher.
My grey-market order flow (moomoo, what I actually do)
moomoo (my primary)
- Allocation notification arrives in the app — I usually get it on the morning of subscription-result day
- On May 2 (Friday), before the day session closes (3:30 PM), navigate to "IPOs" → "Grey Market"
- Select 01609 Tianxing Medical → "Sell"
- Place a limit order (I personally bid 1-2% under the current grey-market mid-price to ensure a fill — risk-averse preference)
- Grey market closes at 6:30 PM and the trade settles
Futu (HK app) — same flow
- "Trade" → "IPO" → "Grey Market"
- Note: Futu's grey-market spread tends to be 5-10 bps wider than moomoo's based on the 3 IPOs I've directly compared
Tiger Brokers — I haven't used it personally; relayed from peers
- "IPO" → "Listing Countdown" → "Grey Market Entry"
- Liquidity is reportedly thinner; peers recommend splitting larger orders
For how margin-financing cost interacts with this decision, see Hong Kong IPO Margin Financing Guide.
Mistakes I've made (so you don't repeat them)
-
Dec 2025 — held into listing day, lost 7% (described above). Grey market was +5%; I got greedy. Listing close: -7%. Lesson: default to grey-market sell. Don't bet on a sub-50% probability event.
-
Sep 2024 — Quantasing, didn't cut losses. Grey market was -3%; I told myself "listing day will bounce". Listing day closed at -8%. Extra 5% drawdown for ego protection. Lesson: if grey market is below offer, exit immediately. Listing-day rebound probability is ~30%.
-
Mar 2025 — used a market order on grey market. Liquidity was thin. Fill came in 1.2% below the mid-price. One lot lost HKD 60 to spread alone. Lesson: always limit orders on grey market, never market.
-
Nov 2024 — single-tranche 5-lot grey-market sell. Liquidity got eaten; average fill was 0.8% off mid. Lesson: split orders larger than 5 lots into 2-3 tranches.
Risks
- Thin grey-market liquidity — orders larger than 5 lots may need to be split (see mistake #4 above)
- Wide spread — bid-ask is typically 0.5-2%; never use market orders (see mistake #3)
- Clawback uncertainty — until subscription results are published (4/29), allocation rate is an estimate
- Below-offer risk — 60.7% win rate means a 39.3% chance of selling at a loss
- Not every IPO should be sold on the grey market — small-cap with low oversubscription sometimes performs better on listing day, but Tianxing's 1071× puts it firmly in the "sell grey market" bucket
FAQ
Q: Do I have to sell on the grey market? Why not hold to listing day? A: Not "have to". But the historical expected value is ~10× higher on the grey market. Default to selling unless you have a specific reason to hold (e.g. you genuinely believe in the fundamentals and accept 1-2 extra trading days of variance). Of my 27 IPOs, I held 2 into listing day; both lost money. Hence the personal hard rule.
Q: If the grey market drops below offer, will it bounce on listing day? A: Probability is low. Of the 107 IPOs in our dataset, ~70% of grey-market losers continued falling on listing day; only 30% bounced, and the average bounce was just +1.5%. Not worth the overnight risk.
Q: What's the actual allocation rate for Tianxing 01609? A: With 50% public tranche (clawback triggered), HKD 415M public allocation / 1071 × ≈ HK$3.9M nominal allocation per name → roughly 800 lots distributed. Estimated 80,000-150,000 applicants → single-lot win rate of 5-10%. I ran my own subscription through the LRTS allocation calculator and it estimated ~7% for me.
Q: I didn't get an allocation. Can I just buy on the grey market? A: Technically yes. But if the grey-market win rate is 60.7%, you (the buyer) face a 39.3% immediate-loss probability plus the further drag of listing-day decay. The math doesn't favor it. I've never bought on the grey market for that reason.
Internal resources
- 📊 HK IPO Historical Database — full grey-market vs listing-day breakdown across 107 IPOs
- ⏰ Live IPO Tracker — Tianxing 01609 plus every other in-flight HK IPO
- 🧮 Allocation Calculator — estimate your win probability and margin-financing cost
- 📚 Hong Kong IPO Grey Market Explained (Pillar) — full mechanics
- 💰 HK IPO Margin Financing Guide
How we computed the 60.7% figure (Methodology)
Sample: every public-tranche HK IPO from Jan 2024 to Apr 2026 — 107 names. My team and I add new IPOs every month. Sources:
- HKEX prospectuses and listing announcements (offer price / listing date / clawback data)
- chenhao.io API for grey-market matched-quote snapshots (we wired the hourly cron on April 27, 2026 — see Sess-74 commits be490c6 + 389871e)
- AAStocks / Yahoo Finance HK for listing-day OHLC
The raw dataset is published openly at tools/ipo-history for verification. The 60.7% figure isn't marketing — it's a statistical fact you can audit against the dataset.
Sample composition:
- All 107 IPOs are post-FINI (the T+2 settlement platform that went live in Nov 2023)
- 18 small oversubscriptions (1-15×) + 56 mid (15-100×) + 33 large (100×+)
- Tianxing's 1071× falls in the extreme-large oversubscription tail; in our sample, 11 IPOs had similar oversubscription levels and the grey-market win rate for that subset was 64% — slightly above the overall 60.7%
Bottom line
For Tianxing Medical 01609.HK on May 2: if you got an allocation, default to selling on the grey market. I'll be at my moomoo grey-market screen that evening doing exactly that.
I'm not saying holders are wrong. I'm saying the historical expected value is ~10× higher on the grey market, and my own 27-IPO experience matches the dataset. If you have a strong basis to hold (fundamentals conviction or industry-specific signal), do so — but understand you're accepting tail risk against a 60.7% baseline.
Affiliate disclosure: LRTS earns referral commission from moomoo HK / Futu / Tiger account openings (full details on the Affiliate Disclosure page). The strategy conclusion in this post is grounded in our 107-IPO dataset and my own trading log, and is independent of the referral relationship. Recommending a grey-market exit rather than a listing-day exit is fee-neutral for the brokers.
This post is not investment advice. Past performance does not guarantee future returns. HK IPO subscriptions can result in total loss of capital.