ones' Tudor Investment's $9 billion Raptor Fund dropped 9 percent in July when the prices of U.S. stocks exploded lower in the last two weeks of the month.
The Boston-based Raptor's loss wiped out its year-to-date gains. It is now down 2.89 percent, according to a fund official.
A spokeswoman would not comment on what led to the losses.
The other fund, Tudor's $10.3 billion Tudor BVI Fund - which he manages personally - dropped 3.1 percent in July. It is up 4.6 percent so far this year.
Despite the sharp losses, and continuing deterioration in credit and derivative markets where Jones' portfolios are active, Greenwich, Conn.-based Tudor Investments, which has $20 billion in assets, remains profitable for the year.
Meanwhile, Caxton Associates' $3 billion Global Bond Fund dropped just under 3 percent, according to Bloomberg.
From MSNBC:
US mortgage turmoil hit investor confidence on the other side of the Atlantic on Wednesday as details emerged of a German government rescue of a domestic lender that suffered heavy losses on subprime investments.
The rescue of IKB, a specialist lender based in Düsseldorf, began on Sunday when Peer Steinbrück, German finance minister, called top banking executives to discuss a bail-out. According to people who took part in the conference call, Jochen Sanio, head of Germany's financial regulator, is said to have warned of the worst banking crisis since 1931.
IKB surprised investors this week with a profits warning after a multi-billion euro fund it managed was hit by problems stemming from its US subprime exposure. The news sent its shares plunging and prompted KfW, the state-owned development bank, to step in with a pledge to guarantee obligations of more than €8bn ($10.9bn) – more than five times IKB's stock-market value.
