* FTSE 100 down 0.1 pct
* HSBC turns negative after H1 results
* Heavyweight oil shares follow rising crude prices
* Interest rates verdicts due later this week
By Michael Taylor
LONDON, Aug 4 (Reuters) - Britain's benchmark stock index reversed earlier gains to trade flat on Monday, as oil shares tracked rising energy prices, while Europe's biggest bank HSBC <HSBA.L> dragged after its first-half results.
At 1059 GMT the FTSE 100 <
> was down 1.8 points, or 0.1 percent at 5,352.9. The blue-chip index lost 1.1 percent on Friday and is now over 17 percent lower this year.HSBC added more than 1 percent before falling 2.3 percent after it said its first-half profit fell 28 percent, in line with forecasts, as a $14 billion hit on bad debts on U.S. home loans and asset writedowns offset strong Asian growth.
The bank also said it was still too soon to say whether bad U.S. housing debts had peaked in the first half of the year, despite a slower rate of deterioration. See [
] and [ ]Other banking stocks to fall included HBOS <HBOS.L>, Lloyds TSB <LLOY.L> and Royal Bank of Scotland <RBS.L>.
In commodities, oil shares benefitted from steady U.S. crude prices <CLc1> and merger activity. BP <BP.L>, Tullow Oil <TLW.L> and BG Group <BG.L> tacked on 1.2-1.5 percent.
Royal Dutch Shell <RDSa.L> rose 1.7 percent after the Sunday Times said it had held talks with AIM-listed oil firm Sibir Energy <SBE.L> about a 1 billion pound ($1.98 billion) asset swap deal. [
]"Bit surprised we've had such a decent start to the day," said Peter Dixon, UK economist at Commerzbank. "What is clear, if you look at trading volumes, there has been a significant tailing off and I'd suspect the moves we're seeing are being exaggerated by thin trading."
"Markets have a bit more correction to go -- maybe not a huge amount -- if you said to me markets down another 5 percent from here, I'd certainly go along with that," he added.
Volume on the FTSE was equal to about 20 percent of the full-day 30 day average.
Russia-focused oil company Imperial Energy <IEC.L>, already discussing a 1.3 billion pound takeover, advanced 8.2 percent after it said it was in talks with a second unnamed suitor.
Earlier British media said China Petroleum & Chemical Corp, the Chinese state-owned company better known as Sinopec <0386.HK>, had launched a bid for Imperial. [
]
RATE VERDICT BONANZA
On the economic calendar, U.S. personal consumption expenditure data, which contains the core PCE reading -- the Federal Reserve's preferred measure of inflation -- is due at 1230 GMT.
But the big economic risk events this week will be the rate decisions of the Federal Reserve, the Bank of England and the European Central Bank. Analysts expect all three to stay on hold.
"Interest rates very important this week," said Angus Campbell, head of sales at Capital Spreads.
"Their remit is to tackle inflation and not really to look after the economy as such as a first port of call -- it seems that the remit is shifting somewhat and there is external pressure being placed on them in order to keep the economy afloat."
In other M&A activity, Punch Taverns <PUB.L> gained 5.8 percent after buyout group CVC Capital Partners weighed up a bid approach to the pubs operator, the Daily Mail reported.
Both Punch and CVC declined to comment.
Related companies to climb included SABMiller <SAB.L> and Whitbread <WTB.L>.
Centrica <CNA.L> added 1.2 percent on media reports that it may revive plans for a 22.5 billion pound ($44.47 billion) merger with British Energy <BGY.L> after French group EDF's <EDF.PA> takeover of the nuclear operator stalled on Friday.
British Energy was up 1.9 percent.
Metal prices drifted lower to weigh on other mining shares, with ENRC <ENRC.L>, Kazakhmys <KAZ.L> and Vedanta <VED.L> down between 4.2 and 4.6 percent.
Anglo American <AAL.L> shed 3.3 percent after Goldman Sachs cut its price target on the stock to 4,280 pence from 4,495 pence.
"This week marks the first anniversary of the credit crunch as it was on Aug 9, 2007 that the true horror of the credit crisis hit home," said David Scott, senior stockbroker at Redmayne-Bentley Stockbrokers in a note on the markets.
"Early proclamations from bankers and politicians that it would be over within a few months appear to be very reminiscent of comments made ahead of the First World War which, of course, lasted for many years."
(Additional reporting by Dominic Lau; Editing by Victoria Main)