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Video: Compound Annual Growth Rate (CAGR) Definition
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 |
| Date |
Open |
High |
Low |
Close |
Volume |
| 11/03/2025 |
$4.20 |
$4.23 |
$4.20 |
$4.23 |
1.20K | | 11/04/2025 |
$4.23 |
$4.23 |
$4.23 |
$4.23 |
0 | | 11/05/2025 |
$4.35 |
$4.35 |
$4.35 |
$4.35 |
1.10K | | 11/06/2025 |
$4.45 |
$4.45 |
$4.43 |
$4.43 |
900 | | 11/07/2025 |
$4.43 |
$4.43 |
$4.43 |
$4.43 |
0 |
 |
| Rubicon Technology is operating through its subsidiary, Rubicon Technology Worldwide LLC (RTW). RTW is a materials provider specializing in monocrystalline sapphire for applications in optical and industrial systems. Co. provides optical and industrial sapphire products in various shapes and sizes, including round and rectangular windows and blanks, domes, tubes and rods. These optical sapphire products are used in equipment for a variety of end markets and applications, including defense and aerospace, specialty lighting, instrumentation, sensors and detectors, semiconductor process equipment, electronic substrates, medical and laser applications. | |
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RBCN (RBCN) has the following price history information. Looking back at RBCN historical stock prices for the last five trading days, on November 03, 2025, RBCN opened at $4.20, traded as high as $4.23 and as low as $4.20, and closed at $4.23. Trading volume was a total of 1.20K shares. On November 04, 2025, RBCN opened at $4.23, traded as high as $4.23 and as low as $4.23, and closed at $4.23. Trading volume was a total of 0 shares. On November 05, 2025, RBCN opened at $4.35, traded as high as $4.35 and as low as $4.35, and closed at $4.35. Trading volume was a total of 1.10K shares. On November 06, 2025, RBCN opened at $4.45, traded as high as $4.45 and as low as $4.43, and closed at $4.43. Trading volume was a total of 900 shares. On November 07, 2025, RBCN opened at $4.43, traded as high as $4.43 and as low as $4.43, and closed at $4.43. Trading volume was a total of 0 shares.
RBCN Historical Stock Prices By Date:

Below, we examine the compound annual growth rate — CAGR for short — of an investment into RBCN shares, starting with a $10,000 purchase of RBCN, and working forward through the historical stock price information to today.
Growth of $10,000.00
Without Dividends Reinvested
|
| Start date: |
08/17/2022 |
|
| End date: |
11/07/2025 |
|
| Start price/share: |
$5.01 |
|
| End price/share: |
$4.43 |
|
| Dividends collected/share: |
$0.00 |
|
| Total return: |
-11.58% |
|
| Average Annual Total Return: |
-3.74% |
|
| Starting investment: |
$10,000.00 |
|
| Ending investment: |
$8,842.46 |
|
| Years: |
3.23 |
|
|
 |
| Date |
Close |
| 11/03/2025 | $4.23 | | 11/04/2025 | $4.23 | | 11/05/2025 | $4.35 | | 11/06/2025 | $4.43 | | 11/07/2025 | $4.43 |
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