American International Group Inc, the world’s biggest insurer, has announced it will replace CEO Martin Sullivan. The news comes after AIG reported record losses due to risky mortgage bets.

Sullivan follows the departure of a wave of Wall Street top execs, including the recent bloodletting at ailing investment bank Lehman Brothers.

“On Wall Street, after Bear Stearns fainted, the other financial firms took smelling salts,” says Bill Bonner in The Daily Reckoning.

As the financial services giants get cut down to size, metals are now the biggest source of mergers and acquisitions on Wall Street, according to a report on Bloomberg.

The value of announced mining takeovers more than tripled to $199 billion in the first five months of 2008 from a year ago – the first time mining mergers have topped Bloomberg’s mergers and acquisitions table since it began 1998.

Meanwhile, gold prices are set to reach record levels, says Mike Caggeso in Money Morning.

This week saw Lehman Brothers replace two of its top executives: CFO Erin Callan and COO Joseph Gregor. The two will remain at the bank in lesser roles.

“As recently as a month ago,” says Justice Litle in Taipan Daily, “Erin Callan was on top of the world.”

The WSJ did a glowing piece on her rise through the ranks. Condé Nast’s Portfolio magazine dubbed her the most powerful woman on Wall Street.

There is a 95% chance that the US economy will enter a recession, according to a report in BusinessWeek magazine.

Jennifer Yousfi in Money Morning gives some background and examines strategies for recession proof investing:

U.S. Federal Reserve policymakers cut the benchmark interest rate by less-than-expected three-quarters of a percentage point at their last meeting, a move that was designed to energize a badly flagging economy without causing inflation to spike or exacerbating the greenback’s decline.

With a wheezing economy that’s struggling with housing and credit problems – as well as a weak dollar – it’s clear the United States won’t be in the investment spotlight this year.

A new report by Paris-based economic think tank the OECD warns of a severe house price crash in the UK.

The report predicts that UK house prices will crash by 10% by 2010 and that, with consumer spending slowing, the Bank of England will eventually need to cut interest rates by three-quarters of a percentage point to 4.25% next year.

Ben Traynor in The Daily Reckoning explains how a house price crash in the UK will affect the country’s economy…

Lehman Brothers, the fourth largest US investment bank, is at the centre of a storm of bad news stories.

Shares in the Wall Street powerhouse tumbled 31% last month on the NYSE on expections of heavy Q2 losses and the likelihood that the bank will have to raise cash to cover subprime-related writedowns. However, unlike rival Bear Stearns, the word on the Street is that Lehman will survive.

“On Wall Street, after Bear Stearns fainted, the other financial firms took smelling salts,” says Bill Bonner in The Daily Reckoning.

Home prices in Manhattan have remained largely immune from the housing crisis gripping the US… until now.

According to Reuters, the New York real-estate market is showing a significant reduction in new deals as Wall Street sheds staff to reduce costs.

“For the most part, the subprime crisis is past its inflection point,” says Eric Roseman in the Offshore A-Letter. “What matters now is how and when other credit indicators normalize.”

It is easy to think about the credit crunch in terms of banks. The banks made these weird structured products, the banks are responsible for the borrowing rate, the banks falling market cap is dragging on the FTSE, etc.

It’s only the fifth day in June, but already investors are getting nervous about end of quarter earnings reports. There’s still almost a month to go before most public companies close out their books for the second-quarter, ending June 30.