The basis between spot and future prices will be affected by jump behavior in each asset price, challenging intraday hedging strategies. Using formal cojumping tests this paper considers the cojumping behavior of spot and futures prices in high frequency US Treasury data. Cojumping occurs most frequently at shorter maturities and higher sampling frequencies. We find that the probability of cojumping is altered by the presence of an anticipated macroeconomic news announcement. The probability of cojumping is particularly affected by news surprises in non-farm payrolls, CPI, GDP and retail sales. However, the two cojumping tests are also more likely to provide contradictory results in the presence of surprises in non-farm payrolls. On these occasions the market does not clearly signal its short term pricing behavior.

We investigate the systemic importance of U.S. non-financial corporations and analyse the firm-specific characteristics that identify systemically important non-financial firms. We compute two firm-specific measures of systemic risk for 1145 non-financial corporations and confirm that these firms are both vulnerable to systemic shocks and contribute to system-wide risk, though firms that are high in one dimension of risk are not necessarily high in the other. Systemic risk measures exhibit substantial variation across firms and over time. The firm's beta, value-at-risk, size, debt and trade credit are related to both dimensions of systemic risk, while a range of other firm characteristics are associated with systemic risk in at least one direction. The differences between the dimensions of risk and their associated characteristics underline the importance of analysing both measures of risk.