| Name of Stock | % change |
| ComfortDelgro | -5.2% |
| Jardine Cycle & Carriage | -3.12% |
| SIA | -1.39% |
| ST Engineering | -1.07% |
| Thai Beverages | -0.56% |
The following are the top five loser STI constituent stocks based on their stock closing prices as of 15 May 2017.
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