The sale of a major asset like the M/T Wonder Sirius tanker and the expected net gain of $20.9 million is likely to be viewed positively by investors. This could lead to a short-term increase in the stock price as it reflects the company's ability to efficiently manage its assets and generate profit. However, the actual impact on the stock price will depend on the market's perception of the sale's long-term benefits and the company's future investment plans.