Amerant Bancorp Short Sellers Build Into Q3 Earnings

Short interest in AMTB has climbed 22% over the past month, reaching 5.2% of free float, with most of that increase arriving in the second week of October.

The build is notable because the borrow market tells a different story. Availability is extremely loose at 1,055% of short interest, meaning roughly ten shares remain available to lend for every one already borrowed. Cost to borrow has actually eased 18% over the past week to 0.44%, near the low end of its range across the past 30 days. Shorts have been building positions without any pressure on the lending pool, a sign of deliberate accumulation rather than a crowded or contested trade.

Options positioning leans the other way. The put/call ratio of 0.54 is below its 20-day average of 0.59, about 1.4 standard deviations beneath the mean, reflecting relatively more call activity than usual into the print. That tilt toward calls sits at odds with the rising short interest, and together the two signals describe a split market: some participants adding downside exposure through outright short positions, others buying upside through calls.

The analyst backdrop is mixed, and the most recent formal action leaned cautious. Stephens & Co. downgraded AMTB to Equal-Weight in August, stepping back from a prior Overweight rating. Keefe, Bruyette & Woods kept its Market Perform designation but raised its target to $31 from $26 after the July earnings print. At $29.66, AMTB is now trading close to that $31 target, compressing the implied upside that bulls were pricing in after the summer rally. The bull case centres on tangible book value momentum and management's guidance for 80 to 90 basis points of ROA, while bears point to elevated loan payoffs, reliance on brokered deposits and a loan-to-deposit ratio that trails peers. The stock has gained only 0.4% over the past month against a peer median of roughly 2 to 4% on the week, suggesting some relative underperformance has already crept in.

The FDIC call report data for Q2 shows Amerant recorded its largest second quarter for total deposits on record (since 2024), at $8.4 billion, while net loans and leases were the smallest Q2 on record at $6.8 billion. That combination, deposit growth alongside shrinking loans, reflects exactly the payoff dynamic that bears flag as a drag on net interest income. The FDIC dataset has not yet been tested as a lead indicator for Amerant's reported figures, so no directional read-through to the print is warranted, but the deposit and loan gap going into Q3 frames the core tension the company will need to address.

History adds texture. The two most recent quarters both produced outsized moves: AMTB gained 14.2% on the day after the July 2026 print and 12.0% on the day after the April print, with five-day gains of 14.5% and 16.3% respectively. Those reactions set a high bar. The print will test whether the deposit record and any improvement in the loan book can sustain the pattern of positive surprises that drove a 47% year-to-date gain, or whether the gap between deposit growth and loan contraction is already weighing on margin.