The author ignores that behind the downfall of SVB was a climate of excess liquidity on the markets, a bonanza created by the authorities that made SVB see itself with a glut of funds. Now, SVB, loaded with money, could have tried loaning it like crazy, but instead, decided to go the conservative way and buy bonds. Someone could argue that they could have foreseen that this abundance of liquidity in the markets, alon…
Just because government bonds are unlikely to default, that doesn't make acquiring them "conservative". If you're a bank, with an entire function dedicated to making sure that assets match liabilities ("treasury"), and that ought to be aware of things like "DV01" and "duration risk", then you're supposed to know this.