1.   Arbitrary challenges and revisions have left foreign investors questioning the reliability of their contracts.

2.   Bidding for at least one of the five previous gas concessions, in Tampico, has left some investors disgruntled.

3.   A second dose of benign U.S. inflation news next week will leave investors with three good reasons why Federal Reserve policymakers should leave interest rates alone this month.

4.   A second dose of benign U.S. inflation news this week will leave investors with three good reasons why Federal Reserve policymakers should leave interest rates alone this month.

5.   A steep downturn in the market could leave individual investors feeling poorer and cause them to rein in their spending.

6.   After all the thrills and spills, investors are left somewhere between break-even and bank-deposit returns.

7.   All of these factors still leave investors searching for clues to determine whether corporate profit growth will improve in the second half of the year.

8.   All of which leaves investors sorting out crossed wires.

9.   All that leaves investors with plenty of reasons to buy U.S. Treasury securities.

10.   But even those kinds of advances left investors with steep losses for the year.