An analysis said the Bitcoin market may need to watch shifts in global funding conditions as Japanese government bond yields rise and institutional investors simultaneously net sell foreign bonds.

CryptoSlate, a blockchain media outlet, reported on Oct. 7 that demand strengthened at Japan's 10-year government bond auction even as the yield increased.

The average yield at the 10-year government bond auction held by Japan's Ministry of Finance on Oct. 6 was 3.101 percent. That was 10.6 basis points higher than 2.995 percent at the Sept. 1 auction. The bid-to-cover ratio rose to about 3.76 from about 3.29. It means market participants actively accepted bonds offering higher interest rates.

The tail, the gap between the yield at the lowest accepted price and the average yield, narrowed to 0.2 basis points from 1.6 basis points. The outlet pointed to this as showing that "demand became firmer even at higher yields." It was presented as a point that can be interpreted as a signal that domestic funds in Japan may tilt further toward local bonds.

Behind this trend is selling of foreign bonds by Japanese institutions. Japan's Ministry of Finance data on fund flows dated Oct. 1 showed major reporting institutions resident in Japan net sold 1.9049 trillion yen of long-term foreign bonds during Sept. 13 to 19, and net sold 684.5 billion yen during Sept. 20 to 26. Combined, net sales total 2.5894 trillion yen.

Still, those statistics alone cannot determine a shift into any specific asset. The category counts foreign securities based on the issuer's place of residence and does not distinguish sales of U.S. Treasuries, the scale of currency conversion, reinvestment into Japanese government bonds, or purchases of Bitcoin.

Even so, the market focus is the funding environment. If Japanese institutions continue to prefer domestic bonds over foreign bonds, demand for foreign bonds could fall and borrowing costs could rise. In that case, less capital may be available for risk assets, which could weigh on Bitcoin. The outlet described this channel as "potential funding pressure on Bitcoin."

A working paper by researchers at the Bank for International Settlements (BIS) also supports that view. Based on a sample from 2017 to mid-2024, the researchers saw global funding conditions and speculative motives as important drivers of cross-border flows into Bitcoin and Ether. It suggests that how easily funding can be raised, rather than the Bitcoin price itself, can affect inflows into the market.

It was also suggested that changes in Japanese bond allocation should be viewed separately from the yen carry trade. Adjusting the bond share in institutional portfolios is different from trades that generate leverage with borrowed yen. The 10-year government bond yield is not an indicator that directly shows short-term yen funding costs. BIS researchers said in an August 2024 analysis that deleveraging and higher margin requirements increased market volatility at the time, but they did not see that as meaning the same liquidation phase is under way now.

Ultimately, the next points to watch are twofold: whether Japanese institutions' net selling of foreign bonds continues, and whether separately observed funding stress emerges at the same time. CryptoSlate said, "If foreign bond selling continues and funding stress is independently confirmed, it could align with the proposed Bitcoin funding channel." If foreign bond buying resumes and funding markets stabilize, the persuasiveness of this interpretation could weaken.