International Seaways Stock: 8 Straight Green Days, Up 13%
A sustained run has lifted the stock, but the real question is whether the underlying business justifies the new attention.
Shares of International Seaways (INSW) have now risen for eight consecutive trading days, a streak that has delivered a cumulative gain of 13%. That move added about $611 million to the company’s market value, which now stands at about $5.5 billion.
For anyone holding the stock, the run has been a significant event. International Seaways stock trades at about $111.15 a share as of 9/18/2026.
How The Streak Stacks Up Against The S&P 500
Here is how INSW stock stacks up against the S&P 500 over the streak and the periods around it:
| Return Period | INSW | S&P 500 |
|---|---|---|
| 1D | 0.6% | 0.2% |
| 8D (Current Streak) | 12.5% | -0.3% |
| 1M (21D) | 17.1% | -0.7% |
| 3M (63D) | 38.2% | 2.0% |
| YTD 2026 | 162.4% | 11.8% |
| 2025 | 44.9% | 16.4% |
| 2024 | -10.9% | 23.3% |
| 2023 | 42.9% | 24.2% |
Do the fundamentals support this price?
The data suggests a business performing well against its peers. Revenue over the last twelve months grew 57.4%, far outpacing the 12.5% median for S&P 500 Energy stocks. The company’s operating margin of 55.7% is also well ahead of the 22.9% median. On valuation, INSW trades at a price-to-earnings multiple of 7.1, compared to a median of 17.2 for its peer group.
This streak is the stock’s own story. Over the same eight trading days, the S&P 500 returned -0.3%. The sources do not show why the move happened.
A streak is information, not an instruction.
A long run of gains or losses is a signal about momentum and investor attention. It is not a command to buy or sell. The disciplined response is always the same: check the business against the price the market is asking for it.
The numbers here offer a starting point for that work. A streak can end at any time, but an informed view of the underlying business is what allows an investor to act when it does.
A climb like this is worth respecting, and worth testing: the momentum that lasts is usually the kind management itself is underwriting. Our Guidance Momentum screen tracks the stocks whose companies just raised their own forward numbers.
And for anyone who would rather back the theme than one company’s story, an energy ETF like XLE holds the whole group, not the single stock. It is still a concentrated bet on that one theme, though, which is exactly the gap the portfolio below closes.
Momentum Is A Tailwind, Not A Plan
Riding a stock that rises every day feels effortless, and that is precisely the danger: the same momentum that built this run can reverse without notice, and one name’s reversal should never be able to reset your whole year.
That is what the Trefis High Quality (HQ) Portfolio is for: about 30 quality businesses screened for the fundamentals that survive momentum’s mood swings, held with rules. It has a track record of outpacing a benchmark that combines the three major indices – the S&P 500, S&P Mid-cap, and Russell 2000. Watch the runs; own the resilience.