[Short-selling transactions in the U.S. Treasury futures market are intensive, and the risk of short squeezes is quietly rising] On September 30, traders are increasing their bets that U.S. Treasury yields will continue to rise from their current highs in about two decades, which increases the risk that these positions may be suddenly unwound once the economy shows obvious signs of cooling. With that in mind, bond traders are focused on a slew of key data coming out this week, including the Fed's favored inflation measure on Wednesday and Friday's non-farm payrolls report. Open interest in the 5-year and 10-year U.S. Treasury futures contracts has risen sharply over the past few weeks. Data from the Chicago Mercantile Exchange (CME) shows that traders have increased their positions in the 5-year contract on 11 of the past 12 trading days; traders have increased their 10-year contract positions on 13 of the past 14 trading days.