Ticker MU (Micron Technology, NASDAQ-listed, ~$100B+ market cap) was mapped to a Japanese subsidiary instead of the parent company. This was caught by cross-referencing the DB name against Finnhub's company profile API.
Name: Micron Memory Japan, G.K.
Website: (none)
Country: (none)
Description: (none)
Name: Micron Technology, Inc.
Website: micron.com
Country: US
Description: Leading global manufacturer of memory and storage semiconductors (DRAM, NAND, NOR).
Multiple companies sharing the same ticker symbol. Mostly Chinese/English duplicate entries.
DB company name doesn't match Finnhub ground truth. Includes subsidiaries and divisions holding parent tickers.
DB market cap >2x off from Finnhub. Often currency mismatch (Finnhub reports in local currency for HK/SZ stocks).
High-value companies (>$10B market cap) with no description text.
| Severity | Type | Company | Ticker | Detail | Suggested Fix |
|---|---|---|---|---|---|
| HIGH | duplicate ticker | BYD Company | BYD | 1211.HK |
2 companies share ticker 1211.HK: BYD Company | BYD | — |
| HIGH | duplicate ticker | Taiwan Glass | Taiwan Glass Industry Corporation | 1802.TW |
2 companies share ticker 1802.TW: Taiwan Glass | Taiwan Glass Industry Corporation | — |
| HIGH | duplicate ticker | Sunny Optical TechnologyCo Ltd | Sunny Optical Technology Co | 2382.HK |
2 companies share ticker 2382.HK: Sunny Optical TechnologyCo Ltd | Sunny Optical Technology Co., Ltd. | — |
| HIGH | duplicate ticker | WIN Semiconductors | 稳懋半导体 | 3105.TW |
2 companies share ticker 3105.TW: WIN Semiconductors | 稳懋半导体 | — |
| HIGH | duplicate ticker | FOCI Fiber Optic Communications Inc. | Jing-Shing Tech. Co., | 3363 |
2 companies share ticker 3363: FOCI Fiber Optic Communications Inc. | Jing-Shing Tech. Co., Ltd. | — |
| HIGH | duplicate ticker | Doosan Robotics | Zaram Technology | 454910 |
2 companies share ticker 454910: Doosan Robotics | Zaram Technology | — |
| HIGH | duplicate ticker | Toho Titanium Co., Ltd. | Japan New Metals Co., Ltd. | 5727 |
2 companies share ticker 5727: Toho Titanium Co., Ltd. | Japan New Metals Co., Ltd. | — |
| HIGH | duplicate ticker | Taiwan Union Technology Corporation | SODICK Co., Ltd. | 6143 |
2 companies share ticker 6143: Taiwan Union Technology Corporation | SODICK Co., Ltd. | — |
| HIGH | duplicate ticker | Symtek Automation Asia Co., Ltd. | AIDA | 6438 |
2 companies share ticker 6438: Symtek Automation Asia Co., Ltd. | AIDA | — |
| HIGH | duplicate ticker | Socionext Inc. | Airoha Technology Corp. | 6526 |
2 companies share ticker 6526: Socionext Inc. | Airoha Technology Corp. | — |
| HIGH | duplicate ticker | Nidec Sankyo Corporation | Nidec SV Probe | 6594 |
2 companies share ticker 6594: Nidec Sankyo Corporation | Nidec SV Probe | — |
| HIGH | duplicate ticker | Sony Interactive Entertainment | Sony Semiconductor Solution | 6758 |
2 companies share ticker 6758: Sony Interactive Entertainment | Sony Semiconductor Solutions | — |
| HIGH | duplicate ticker | Alps Alpine | Powerchip Semiconductor Manufacturing Corp | 6770 |
2 companies share ticker 6770: Alps Alpine | Powerchip Semiconductor Manufacturing Corp | — |
| HIGH | duplicate ticker | Horiba, Ltd. | TSK Corporation | 6856 |
2 companies share ticker 6856: Horiba, Ltd. | TSK Corporation | — |
| HIGH | duplicate ticker | Joulwatt | Jewatt | 688141 |
2 companies share ticker 688141: Joulwatt | Jewatt | — |
| HIGH | duplicate ticker | Hefei Jinghe Integrated Circuit Co., Ltd. | Nexchip Semicond | 688249.SS |
2 companies share ticker 688249.SS: Hefei Jinghe Integrated Circuit Co., Ltd. | Nexchip Semiconductor Corporation | — |
| HIGH | duplicate ticker | 芯动科技有限公司 | 国芯科技 Guoxin Microelectronics | 688262.SS |
2 companies share ticker 688262.SS: 芯动科技有限公司 | 国芯科技 Guoxin Microelectronics | — |
| HIGH | duplicate ticker | Hua Hong Semiconductor Ltd | HuaHong Semiconductor Limited | 688347.SS |
2 companies share ticker 688347.SS: Hua Hong Semiconductor Ltd | HuaHong Semiconductor Limited | — |
| HIGH | duplicate ticker | Wuxi CR Microelectronics | Hu Ruhui Microelectronics | 688396 |
2 companies share ticker 688396: Wuxi CR Microelectronics | Hu Ruhui Microelectronics | — |
| HIGH | duplicate ticker | Shanghai Zhen Hua Feng Guang Semiconductor Co., Ltd. | Guizh | 688439 |
2 companies share ticker 688439: Shanghai Zhen Hua Feng Guang Semiconductor Co., Ltd. | Guizhou Zhenhua Fengguang Semico | — |
| LOW | market cap divergence | Taiwan Semiconductor Manufacturing Company Limited | TSM |
DB: $1,000,000M vs Finnhub: $49,271,795M (0.0x) | — |
| LOW | market cap divergence | Amphenol | APH |
DB: $850,000M vs Finnhub: $162,097M (5.2x) | — |
| LOW | market cap divergence | Industrial and Commercial Bank of China | 1398.HK |
DB: $332,051M vs Finnhub: $2,405,946M (0.1x) | — |
| LOW | market cap divergence | Agricultural Bank of China Limited | 1288.HK |
DB: $330,769M vs Finnhub: $2,279,700M (0.1x) | — |
| LOW | market cap divergence | Toyota Motor Corporation | TM |
DB: $250,000M vs Finnhub: $45,369,233M (0.0x) | — |
| LOW | market cap divergence | Bank of China Limited | 3988.HK |
DB: $235,897M vs Finnhub: $1,579,777M (0.1x) | — |
| LOW | market cap divergence | Contemporary Amperex Technology Co. Ltd. | 300750.SZ |
DB: $234,722M vs Finnhub: $1,636,656M (0.1x) | — |
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