(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) March 31 (Reuters) - European stocks held steady on Wednesday, trading marginally below all-time highs, while investors maintained a cautious stance after food delivery company Deliveroo’s lacklustre London debut and a slew of corporate earnings. The pan-European STOXX 600 index inched up 0.1% by 0817 GMT, on course to end March with a 6.5% rise and the first quarter with an 8.1% gain. Shares in Deliveroo opened well below the price of their initial public offering, and fell as much as 30% to 275 pence. The company priced its initial public offering at 390 pence per share, valuing the company at 7.6 billion pounds ($10.5 billion). Continental peers Just Eat Takeaway and Delivery Hero fell 2.7% and 1.9%, respectively. H&M slipped 1.2% after the Swedish retailer reported a quarterly loss and said it would not propose a dividend at its annual general meeting. Credit Suisse extended losses for a third day on worries its losses linked to the downfall of Archegos Capital, which defaulted on margin calls earlier this week. French business IT services provider Capgemini rose 1.9% after it raised its medium-term margin targets. (Reporting by Sruthi Shankar in Bengaluru, Editing by Sherry Jacob-Phillips)