Corning (GLW) tests its 2000 peak

We still have plenty of interest in the chart for Corning, Inc. (GLW).

Our December 10, 2025, Straight from the Chart highlighted that the September rally above the 61.8% retracement of the 2000 to 2002 decline at 70.46 increased the potential for a full (100% retracement) of the 2000 to 2002 decline. This suggested that GLW could eventually retest its August-September 2000 peaks at 113.33, which has happened in late January 2026.

Chart 1: Corning, Inc. (GLW): Monthly chart

Our best guess is that anyone who bought GLW shares near the 2000 peak is long gone at this point. While the 2000 peak may or may not provide a meaningful resistance, it is a psychological level marking the 2000 "Tech Bubble" peak for this stock.

GLW's daily chart shows a big upside gap on high and possibly climactic volume after a 200% run-up in the name from its April 2025 low. While the upward trend remains intact, GLW tested a 61.8% extension level at 111.52, which is generated by projecting the April-October 2025 rally from the late November low. This coincides with the 2000 peak at 113.99. In addition, the daily chart shows a mildly bearish harami (inside day) candlestick pattern.

The bottom line: GLW's uptrend remains intact, but the stock has tested resistance at 111.52-113.99 on an upside gap with potentially climactic volume after a 200% rally from the stock's April 2025 low. We consider this gap at 100.97 to 95.55 as an important risk management support for those who are long GLW shares.

• Remaining above or holding this gap as support means that the gap is either a bullish breakaway gap or a bullish continuation gap, with the potential for additional upside on GLW toward the 100% extension at 132.62.

• If GLW fills the gap, it would indicate an exhaustion gap and suggest that the retest of the 2000 peak was a "buying climax" given the high volume that formed on the gap.

Chart 2: Corning, Inc. (GLW) (top) and volume (bottom): Daily chart

For those interested in learning more about price gaps, Fibonacci retracements, and Fibonacci extensions, refer to Tech Speak 101 on the Subscriber Dashboard.