Morgan Stanley estimated that Treasury cash-futures basis positions fell 20% this year to about $1.2 trillion, according to September 24 reports. Hedge funds finance these trades through borrowing that can expire before the trades pay off. Morgan Stanley had not found evidence of broad basis-related market stress at that point. A decline in positions alone cannot distinguish orderly exits from forced selling. Replacement buyers may demand higher yields, potentially increasing government borrowing costs even without a market breakdown.