BlackRock investors are relentless. Larry Fink’s firm led exchange-traded fund flows across every sector last week, topping the list with $3.5 billion in flows into its Bitcoin ETF, IBIT. That’s 10% of all net inflows into ETFs. In second and third place came Vanguard and State Street. Their flagship S&P 500 trackers, SPLG and VOO, hauled in $2.4 billion and $2.3 billion, respectively. What’s impressive, however, is that both are getting lapped by a two-year-old. BlackRock’s IBIT has been around since J ...