SBLK, Star Bulk Carriers Corp.

Will it survive?

• Can it pay its interest? 1.9×
  Thin
  Operating income $137M ÷ interest expense $71M
  What this means

  Operating profit covers interest, but with little room. A bad year, a refinancing at higher rates, or a revenue wobble closes the gap fast.

• How heavy is the debt, net of cash? $273M · 2.0× operating profit
  Modest net debt
  Cash $489M − debt $762M
  What this means

  Netting $489M of cash and short-term investments against $762M of debt leaves $273M owed, about 2.0× a year's operating profit (5.6× on the gross debt, before the cash). Net debt is the leverage figure that matters: the cash is already set against the debt. Strategic or illiquid investments aren't counted here.

• How long is cash tied up? —
  Not enough data
  What this means

  The filing data didn't include the inputs for this check.

Is it a good business?

• Return on invested capital 10%
  Solid through the cycle
  8-yr median, range -5%–45%; the latest year is left out — large non-operating charges put its operating line well above pretax profit
  Industry peers: median 4%
  What this means

  The rate the business earns on the money tied up in it, Buffett's north star, because over time a stock tracks the ROIC beneath it. Above ~15% sustained hints at a moat; a return below the cost of capital (~8%) erodes value as a business grows rather than building it — the test Buffett weighs most. The headline is the median of the last 8 years, so one peak or trough year doesn't set the verdict. Asset-light businesses (R&D expensed, little capital) read artificially high, pair this with Owner Earnings.

• Owner-earnings margin 14%
  Solid through the cycle
  10-yr median margin, range -52%–52%; latest $212M = operating cash $296M − maintenance capex $84M
  Industry peers: median 12%
  What this means

  What an owner could take out without starving the business: operating cash less the maintenance capital it must spend to hold its position — Buffett's owner earnings. That's 20% of revenue this year, a 14% median across 10 years.

• Are earnings backed by cash? $296M
  Loss, but cash-generative
  Net income ($435M) · cash from operations $296M
  What this means

  The company reported a net loss, so a conversion ratio isn't meaningful. What matters then is whether operations still threw off cash, here, they did.

How is the cash used?

• Where do the earnings go? 63%
  Returns about half
  Dividends + buybacks $133M ÷ Owner Earnings $212M
  What this means

  Of $212M Owner Earnings, $133M (63%) went back to shareholders, $34M dividends, $98M buybacks. Returning most of it is the mark of a mature business with little left to reinvest at a high return; reinvesting most could mean a long runway, or empire-building. The split doesn't say which; the return earned on it (see ROIC) does.

• Investing or harvesting? 0.50×
  Harvesting
  Capex $84M ÷ depreciation $168M
  What this means

  Descriptive, not a grade. Above ~1× means investing faster than assets wear out (growth, or, sustained for years, today's earnings carrying less depreciation than tomorrow's will). Below means spending less than it's wearing out (efficiency, or a melting asset base). The ratio won't tell you which; the filings will.

Graham’s defensive tests · 0 of 5 met

Graham’s numerical criteria for the defensive investor (The Intelligent Investor, ch. 14), run on the filings. A floor of safety, not a buy signal; many fine modern businesses fail his strictest liquidity rules by design.

• Adequate size Near
  Revenue ≥ $2B · $1.0B
  What this means

  Big enough to weather a storm. Graham's 1972 floor was ~$100M of sales (≈ $700M today); we use a $2B revenue line as a conservative modern stand-in.

• Strong liquidity Near
  Current ratio ≥ 2× · 1.78×
  What this means

  Current assets at least twice current liabilities, near-term bills covered without touching the business. Strict by design: many cash-rich modern firms run leaner and miss it, holding their cushion in longer-dated securities.

• Conservative debt Miss
  Debt ≤ working capital · $762M vs $300M WC
  What this means

  Graham's rule that borrowings not exceed net current assets. Capital-heavy and buyback-heavy firms routinely fail it, read it next to interest coverage, not alone.

• Earnings stability Miss
  A profit every year (10-yr record) · 3 loss years
  What this means

  Graham wanted earnings in each of the past ten years, the stability a defensive owner leans on.

• Dividend record Miss
  Uninterrupted dividends · 7 of 10 yrs
  What this means

  An unbroken dividend was Graham's mark of durability. He wanted twenty years; the filings show about ten, and a single suspension breaks the streak. Non-payers, many fine modern compounders, fall outside his defensive net by design.

• Earnings growth —
  Earnings +33% over the record · —
  What this means

  Earnings were negative early in the record, a growth rate isn't meaningful.

• Moderate price —
  P/E ≤ 15 and P/E × P/B ≤ 22.5 · decided by the price
  What this means

  Graham's valuation gate, the wall he kept between a sound business and a sound investment. Three-year average earnings are $1.65/share (latest year $-3.83), the averaged base the calculator's gate runs on, and book value is $21.59/share. Enter a price in “What the price implies” just below for the P/E, P/B, and whether it clears. But this is the rule Buffett outgrew: there's no hard P/E law, and a wonderful business can deserve a far richer multiple if the thesis holds, treat it as the bargain-hunter's floor, not a verdict on the price.

Durability & moat, 2016–2025

Whether the record’s returns held, and what the capital reinvested earned.

• Profitable years 7 of 10
  What this means

  Lost money in 3 year(s), look at what happened there before trusting the average.

• Operating margin −6% → 23% (3-yr avg ends)

  In the filing’s words The record and the words agree: the margin widened and the filing attributes the gain to its own pricing, not volume alone.

  What this means

  Through the cycle the operating margin widened — about −6% early to 23% lately, median 13% — pricing power intact or improving.

• Reinvestment, incremental ROIC returns capital
  What this means

  The capital base barely grew: this business returns cash through dividends and buybacks rather than reinvesting. Judge it on the cash returned, not on compounding.

• Worst year 2016 · −49.2% op. margin
  What this means

  Operations went underwater in 2016, understand why before trusting the good years.

• Dividend record rising
  What this means

  Paid and raised the dividend across the record, the continuity Graham prized.