Research Frontiers Incorporated REFR
0.38 USD +0.04 (+10.10%)
At closeNov 4, 2026, 4:00 PM EST
0.34 -0.04 -11.67%
After hours · Nov 4, 4:00 PM ET
0.336 Day range 0.398
0.33 52-week range 2.10
- YTD
- -70.62%
- 1 year
- -78.01%
REFR options
| Calls | Strike | Puts | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bid | Ask | Last | % Chg | Volume | Open int | Impl vol | Bid | Ask | Last | % Chg | Volume | Open int | Impl vol | |||
| 0.00 | 0.75 | 0.10 | 0.00% | 40 | 40 | 2100.0% | 0.50 | — | — | — | — | — | — | — | ||
| — | — | — | — | — | — | — | 1.00 | 0.40 | 1.05 | 0.70 | 0.00% | 3 | 7 | 643.8% | ||
| — | — | — | — | — | — | — | 1.50 | 0.55 | 1.45 | 0.99 | 0.00% | 1 | 1 | 1687.5% | ||
| 0.00 | 0.05 | 0.04 | 0.00% | 10 | 529 | 550.0% | 2.50 | 1.90 | 2.40 | 2.20 | 0.00% | 1 | 1 | 593.8% | ||
| — | — | — | — | — | — | — | 5.00 | 4.00 | 4.90 | 4.70 | 0.00% | 2 | 1 | 1587.5% | ||