Why SLM shares fell 10.8% on 23 October

What happened

Sallie Mae’s shares fell 10.8% on 23 October, the session after the company filed its third-quarter results with the SEC on 22 October 2026. Shares closed at $19.41 that day, down from $21.76 the previous close. SLM reported a GAAP net loss per common share of $0.19 for the quarter, against a profit a year earlier, and cut its full-year 2026 earnings guidance to $1.95 to $2.05 a share from the $3.10 to $3.20 range it had given previously. Management also raised its guidance for full-year net charge-offs, to $400 million to $420 million from $365 million to $385 million.

Delinquencies stood at 4.2% of loans in repayment at the end of September, up from 4.0% a year earlier.

How big the move was

A 10.8% one-day fall is large even by SLM’s standards. The stock’s typical daily move over the past year has been 2.5%, so the drop ran at 4.4 times a typical trading day. It was the biggest move in this direction since 27 February 2026.

Market and industry context

The move was not a market-wide event. The S&P 500 fell only 0.5% in the same session.

The fundamentals behind the guidance cut

SLM’s trailing-twelve-month figures show strain building before the headline loss arrived. Free cash flow margin over the same period is -22.3%, down 4.3 percentage points year over year. Even so, the company kept buying back stock: diluted shares outstanding fell 9.2% year over year, and the 8-K confirms SLM repurchased 5.1 million shares for $132.2 million in the quarter, part of $415.6 million repurchased over the first nine months of 2026.

The alternative reading is that this quarter reflects a scaling cost, not a structural one. Originations hit a record and credit quality at approval, measured by winning FICO score, improved from a year earlier. Management framed the charge-off increase as tied to a specific, identified servicing problem with third-party debt collection rather than broad-based borrower deterioration, and said its total allowance as a percentage of loan exposure actually improved slightly, to 5.89% from 5.93%.

Revenue growth on a trailing twelve-month basis is -6.7%, and free cash flow margin over the same period is -22.3%, down 4.3 percentage points from a year earlier. Our model carries no updated valuation-sensitivity scenarios for SLM this cycle, so the size of either input’s effect on modelled value cannot be stated here. These are model values under stated assumptions, not a comparison with the share price.

What comes next

The 22 October release covers the quarter just ended. The next scheduled update will be SLM’s fourth-quarter report, which will show whether the revised full-year EPS range of $1.95 to $2.05 and the $400 million to $420 million net charge-off guidance hold, and whether the originations growth guidance of 12% to 14% for the year is still on track.