(Bloomberg) -- A small group of funds has accumulated such large short wagers in the Treasury market that they could destabilize the broader financial system during times of stress, according to the International Monetary Fund.Most Read from BloombergElon Wants His Money BackDubai Grinds to Standstill as Flooding Hits CityIsrael Reported to Have Launched Retaliatory Strike on IranRecord Rainfall in Dubai? Blame Climate Change, Not Cloud SeedingOil Erases Advance After Iranian Media Downplays Isr