[This article documents an apparent pricing anomaly involving 91/4 percent, 30-year Treasury bonds during the months of May and June 1986. During this period, the price of the 91/4s rose sharply relative to the prices of other long-term Treasury bonds and created a potential arbitrage opportunity. In addition, owners of the 91/4 bonds were able to borrow at a zero interest rate by pledging their bonds. Detailed examination reveals that this relative pricing anomaly cannot be attributed to changes in the level or term structure of interest rates or to differences between the bonds with respect to liquidity, taxation, or duration.]

This article documents an apparent pricing anomaly involving 94 percent, 30-year Treasury bonds during the months of May and June 1986. During this period, the price of the 94s rose sharply relative to the prices of other long-term Treasury bonds and created a potential arbitrage opportunity. In addition, owners of the 94 bonds were able to borrow at a zero interest rate bypledging their bonds. Detailed examination reveals that this relative pricing anomaly cannot be attributed to changes in the level or term structure of interest rates or to differences between the bonds with respect to liquidity, taxation, or duration.

[The degree to which earnings changes are thought to be permanent may determine the magnitude of the security price response to a given earnings announcement [Brown et al., 1985; Kormendi and Lipe, 1987; and Easton and Zmijewski, 1987]. This study extends this literature by examining the impact on stock prices of quarter ahead and year ahead forecast revisions, as well as forecast errors. Results indicate that analysts' forecast revisions provide significant incremental explanatory power in a pooled time-series, cross-sectional regression of abnormal returns on forecast errors and analyst forecast revisions. In addition, the fourth quarter announcement appears to provide more information to analysts and investors than interim announcements.]

The degree to which earnings changes are thought to be permanent may determine the magnitude of the security price response to a given earnings announcement [Brown et al., 1985; Kormendi and Lipe, 1987; and Easton and Zmijewski, 1987]. This study extends this literature by examining the impact on stock prices of quarter ahead and year ahead forecast revisions, as well as forecast errors. Results indicate that analysts' forecast revisions provide significant incremental explanatory power in a pooled time-series, cross-sectional regression of abnormal returns on forecast errors and analyst forecast revisions, in addition, the fourth quarter announcement appears to provide more information to analysts and investors than interim announcements.