Failure to understand a stock back ground is just like stepp...

$Sembcorp Marine(S51.SG)$ Failure to understand a stock back ground is just like stepping into a mine field.  SMM is a not a oil stock. SMM is only an oil related stock. It used to concentrate on oil rigs and support vessels ( How many have ever step into SMM shipyard?). Now time have changed.  It builds all different kind of vessels and ship repairing works. The merger with Keppel O&M will support it share price too. Yes, we all know SMM need cash to continue it operation, let is why it has very huge debt.  And I believed lot of people in Moo app doesn't know that SMM have an asset worth $0.8 / share( 2020 valuation) which will take years to cash out.
As for $RH PetroGas(T13.SG)$ $Rex Intl(5WH.SG)$ , both are purely oil stock.  By just reading the international crude oil price won't much help in trading the stocks.
Don't worry, party can always happen again.. And no party can still play with the small swings....