Celestica Drops 27% in a Month Before Earnings

CLS fell 15.1% in the past week, closing at CAD 364.40 on October 23, a move that dwarfs the median decline of 5.8% across its closest peers. That gap is the central tension heading into today's Q3 print: the stock has repriced sharply, but the lending market and short positioning show almost no conviction behind the sell-off.

The lending data tells that story clearly. Availability is running at nearly 60 times the outstanding short interest, among the loosest readings in the past year, and borrowing costs have collapsed to 0.17% annually, down more than 60% in a week. Short interest itself has fallen 12% over the past week to less than 1% of the free float. Sellers did not borrow and short this stock on the way down. Whatever drove the 27% one-month decline, it was not a build-up of speculative short positions.

The CEO's recent activity is worth noting in that context. Robert Mionis sold roughly CAD 4.7 million worth of shares across several transactions on September 23, all conducted under a pre-arranged 10b5-1 plan. Planned sales carry far less signal than discretionary ones, but the timing, close to the peak before the slide, will attract scrutiny. Director-level activity in the same period was limited to small option-exercise-and-withhold sequences with no meaningful open-market buying to offset the CEO's sales.

The valuation has compressed hard. The price-to-earnings multiple has fallen roughly 6.9 points over the past 30 days to 14.4x, and the price-to-book ratio has dropped nearly 2.8 points to 5.0x. EPS momentum remains a relative strength: the 90-day EPS momentum factor ranks in the 91st percentile, and the stock scores in the 88th percentile on sector ranking. The tension is that forward earnings growth estimates have turned negative, with the 12-month forward year-on-year increase factor sitting in just the 27th percentile. At recent note, Hardware Platform Solutions represented 41% of revenue, but gross margins stayed flat at 11.5%, squeezed by faster-growing but lower-margin AI accelerator programs.

Among peers, the divergence is stark but not universal. FN fell 13.4% over the past week, close to CLS's pace, while COHR dropped 10.1%. SNX and INGM held near flat, suggesting the pressure is concentrated in the higher-complexity, data-centre-exposed names rather than the sector broadly. Three prior earnings prints produced next-day moves ranging from flat to plus 14%, with five-day follow-through consistently positive. The Q3 report is the first test of whether that earnings-day pattern holds after the stock's steepest pre-print decline in recent memory.

The print resolves a specific question: whether the margin profile on AI-infrastructure programs has stabilised, or whether the flat gross margin that persisted through the last quarter is becoming structural at higher revenue scale.