By Jess Jones Shares in semiconductor supplier IQE plummeted 14 per cent in early trading on Tuesday after it disappointed investors with weak guidance and as it racked up debt. The Cardiff-based manufacturer of compound wafers used to make semiconductors said its full-year guidance lies at the lower end of consensus forecasts of revenue between £130m and 154m. It also reported an adjusted EBITDA (earnings before interest, taxes, depreciation, and amortisation) of £11m to 17m, “as some markets remain in recovery” in the second half of 2024. Adjusted operating loss narrowed from £17.5m to £7.2m…