I lean toward this being a positive signal, with an important caveat.

A bond deal that attracts US$85 billion of orders for a US$25 billion issuance suggests credit investors view NVIDIA as a very high-quality borrower. The ability to borrow at only a modest spread over Treasuries gives Nvidia a powerful advantage. It can fund data centres, networking, software, and AI infrastructure without heavily diluting shareholders.

That strengthens the moat because:

Lower cost of capital than most competitors.

Greater flexibility to invest through cycles.

Ability to scale faster if AI demand remains strong.

The caveat is what the money is funding.

If AI demand keeps growing, cheap debt today could look brilliant in hindsight. If industry capacity expands faster than demand, today's investment could become tomorrow's underutilised infrastructure. The risk is not the debt itself. Nvidia's balance sheet can likely support it. The risk is overbuilding.

For now, I view the bond market's enthusiasm as a vote of confidence rather than a warning sign. However, the key metric to watch over the next few years is not debt levels. It is whether revenue, margins, and cash flow continue to grow fast enough to justify the accelerating capital commitments. If they do, the moat widens. If not, the capex burden becomes more visible.