The latest data point for ASML's PEG Ratio in Q1'26 stands at -14.68, indicating a significantly undervalued stock relative to its earnings growth prospects, as negative values suggest the market price is low compared to expected future earnings. This marks a sharp decline from the previous quarter's positive value of 1.90 in Q4'25, highlighting ongoing volatility in valuation metrics. Over the period from Q2'23 to Q1'26, ASML's PEG Ratio has exhibited high volatility with no clear overall trend, fluctuating between extreme highs like 27.58 in Q3'23 and deep negatives such as -83.35 in Q2'23 and -17.29 in Q2'25. Notable patterns include a general decline from mid-2023 peaks to more subdued levels by late 2024, followed by renewed swings into negative territory in 2025 and 2026, potentially signaling inconsistent growth expectations or market corrections in the semiconductor sector. Analysts should monitor for stabilization, as persistent negatives could imply attractive entry points if fundamentals improve.